iPhone 15 vs iPhone 17 Pro
A single brand, two separate lines: Apple covers this space with both the iPhone 15 and the iPhone 17 Pro. If you only read one line, make it this: the iPhone 17 Pro takes 5 of 5 compared areas, and the display gap is the one to look at first. Add $300 of difference in launch price, and the iPhone 15 has a strong argument before a single spec is compared.
At a glance
- Display iPhone 17 Pro wins
- Performance iPhone 17 Pro wins
- Memory & Storage iPhone 17 Pro wins
- Camera iPhone 17 Pro wins
- Battery & Charging iPhone 17 Pro wins
- Price iPhone 15 wins
- Display2.6
- Memory & Storage1.8
- Camera1.7
- Battery & Charging1.9
- Display6.6
- Memory & Storage4.5
- Camera4.5
- Battery & Charging5.3
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
-
The iPhone 17 Pro has a 120 Hz display instead of 60 Hz
A clear win for the iPhone 17 Pro: 120 Hz against 60 Hz. Few specs in this matchup are as one-sided. Smoother motion is one of the most visible display upgrades, and adaptive high-refresh panels can slow down on static content to save power.
-
The iPhone 17 Pro has 13 h more rated video playback
Here the iPhone 17 Pro pulls well ahead of the iPhone 15, with 33 h compared to 20 h. Lab ratings rarely match real life exactly, but comparing them between two phones is still a useful endurance hint.
-
The iPhone 15 has a 1.23 oz lighter build
The iPhone 15 doesn’t just edge this one; 6.03 oz against 7.27 oz is a lead you’ll feel. The iPhone 15 is easier on your wrist during long reading or gaming sessions.
-
The iPhone 17 Pro has 256 GB of base storage instead of 128 GB
Big gap, real consequences. The iPhone 17 Pro’s 256 GB versus the iPhone 15’s 128 GB changes how the two compare in daily use. Base storage is what you get without paying extra. Photos, videos and apps add up quickly, so more space at the entry price is real value.
-
The iPhone 17 Pro has 50% higher peak brightness
The iPhone 15 is clearly behind on peak brightness (2,000 nits against 3,000 nits), and that’s one of its biggest weak spots in this matchup. If you use your phone outdoors a lot, the iPhone 17 Pro’s brighter panel is the one that holds up better at midday.
Design & Size
- iPhone 15 5.81 in × 2.82 in × 0.31 in
- iPhone 17 Pro 5.91 in × 2.83 in × 0.34 in
The official dimensions put the iPhone 15 and the iPhone 17 Pro within a whisker of each other. The iPhone 17 Pro weighs in 1.23 oz above the iPhone 15. If a thin profile matters to you, the iPhone 15 is 0.04 in slimmer.
Design & Build
| Spec | iPhone 15 | iPhone 17 Pro |
|---|---|---|
| Height | 5.81 in | 5.91 in |
| Width | 2.82 in | 2.83 in |
| Thickness | 0.31 in (winner) | 0.34 in |
| Weight | 6.03 oz (winner) | 7.27 oz |
| Water & dust rating | IP68 | IP68 |
| Frame | Aluminum | Aluminum |
Display
iPhone 17 Pro leads
Few areas are as clear-cut as this one: the iPhone 17 Pro leads the display section with room to spare. The iPhone 17 Pro delivers a 120 Hz display instead of 60 Hz. A higher refresh rate makes scrolling, animations and games look smoother. Once you’re used to it, a lower-rate screen can feel sluggish by comparison. Weighing only display, the iPhone 17 Pro comes out ahead.
Refresh rate
iPhone 15: 60 Hz iPhone 17 Pro: 120 Hz You notice refresh rate every time you scroll a feed or a web page, which is why the iPhone 17 Pro feels more fluid in everyday use.
Peak brightness
iPhone 15: 2,000 nits iPhone 17 Pro: 3,000 nits Peak figures are usually reached only in short bursts or small areas of the screen, but a higher ceiling still helps outdoor visibility.
Performance
iPhone 17 Pro leads
If you’re keeping score, the performance point goes narrowly to the iPhone 17 Pro. Point to the iPhone 17 Pro for a newer 3 nm chip process. The iPhone 17 Pro’s chip is built on a more advanced process. That usually points to efficiency gains, though chip design matters just as much. The takeaway: on performance, the iPhone 17 Pro is the stronger phone.
Process node
iPhone 15: 4 nm iPhone 17 Pro: 3 nm Process numbers are partly marketing labels these days, so read this as a hint about efficiency rather than a verdict.
Memory & Storage
iPhone 17 Pro leads
The memory & storage comparison is one-sided. The iPhone 17 Pro leads where it counts. The iPhone 17 Pro gives you 256 GB of base storage instead of 128 GB. If you shoot a lot of video or keep music and maps offline, base storage is one of the specs you’ll feel most over the years. If memory & storage is your priority, the iPhone 17 Pro is the phone to pick.
Base storage
iPhone 15: 128 GB iPhone 17 Pro: 256 GB The iPhone 17 Pro starts with more room, which means fewer “storage full” warnings and less time deleting old videos.
Max storage
iPhone 15: 512 GB iPhone 17 Pro: 1 TB Most buyers are fine with a base or middle tier, so this is a niche advantage, but a real one if you need it.
Camera
iPhone 17 Pro leads
The iPhone 17 Pro clearly takes the camera round. The iPhone 17 Pro steps ahead thanks to an extra rear camera. An extra rear camera usually means another focal length (ultra-wide, telephoto or macro) and more freedom in framing. Prioritize camera, and the iPhone 17 Pro is where you should land.
Rear cameras
iPhone 15: 2 iPhone 17 Pro: 3 The count alone doesn’t guarantee quality, but the iPhone 17 Pro gives you more lenses to choose from.
Ultra-wide camera
iPhone 15: 12 MP iPhone 17 Pro: 48 MP Ultra-wide cameras often lag behind the main one, so the iPhone 17 Pro’s higher resolution helps narrow that gap.
Battery & Charging
iPhone 17 Pro leads
In this area the iPhone 17 Pro has a lead the iPhone 15 can’t close. The iPhone 17 Pro comes with 13 h more rated video playback. More rated playback suggests the iPhone 17 Pro lasts longer on a long flight or an evening of streaming. In short, the iPhone 17 Pro is the better-equipped phone for battery & charging.
Rated video playback
iPhone 15: 20 h iPhone 17 Pro: 33 h Rated video playback is the manufacturer’s own endurance figure, so it reflects efficiency as well as battery size.
Wireless charging
iPhone 15: 15 W iPhone 17 Pro: 25 W Faster wireless charging makes a pad or stand more practical as your main way to top up.
Software & Updates
Nothing to tally in the software & updates section, but plenty to read. The table lists what the iPhone 15 and the iPhone 17 Pro each use.
Full Specifications
Display
| Spec | iPhone 15 | iPhone 17 Pro |
|---|---|---|
| Screen size | 6.1 in | 6.3 in |
| Panel type | OLED (Super Retina XDR) | OLED, ProMotion 120 Hz (Super Retina XDR) |
| Resolution | 2556 x 1179 | 2622 x 1206 |
| Pixel density | 460 ppi | 460 ppi |
| Refresh rate | 60 Hz | 120 Hz (winner) |
| Peak brightness | 2,000 nits | 3,000 nits (winner) |
| Always-on display | No | Yes (winner) |
Performance
| Spec | iPhone 15 | iPhone 17 Pro |
|---|---|---|
| Chipset | A16 Bionic | A19 Pro |
| CPU cores | 6 | 6 |
| Process node | 4 nm | 3 nm (winner) |
Memory & Storage
| Spec | iPhone 15 | iPhone 17 Pro |
|---|---|---|
| Base storage | 128 GB | 256 GB (winner) |
| Max storage | 512 GB | 1 TB (winner) |
| microSD slot | No | No |
Camera
| Spec | iPhone 15 | iPhone 17 Pro |
|---|---|---|
| Main camera | 48 MP | 48 MP |
| Ultra-wide camera | 12 MP | 48 MP (winner) |
| Telephoto camera | N/A (not specified) | 48 MP |
| Optical zoom | N/A (not specified) | 4× |
| Rear cameras | 2 | 3 (winner) |
| Front camera | 12 MP | 18 MP (winner) |
| Max video | 4K60 Dolby Vision | 4K120 Dolby Vision |
Battery & Charging
| Spec | iPhone 15 | iPhone 17 Pro |
|---|---|---|
| Rated video playbackManufacturer rating | 20 h | 33 h (winner) |
| Wireless charging | 15 W | 25 W (winner) |
| Port | USB-C (USB 2) | USB-C (USB 3, 10 Gb/s) |
Software & Updates
| Spec | iPhone 15 | iPhone 17 Pro |
|---|---|---|
| OS at launch | iOS 17 | iOS 26 |
Design & Build
| Spec | iPhone 15 | iPhone 17 Pro |
|---|---|---|
| Height | 5.81 in | 5.91 in |
| Width | 2.82 in | 2.83 in |
| Thickness | 0.31 in (winner) | 0.34 in |
| Weight | 6.03 oz (winner) | 7.27 oz |
| Water & dust rating | IP68 | IP68 |
| Frame | Aluminum | Aluminum |
Price
| Spec | iPhone 15 | iPhone 17 Pro |
|---|---|---|
| Launch price | $799 (winner) | $1,099 |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Price & Value
A launch price gap of 38% is hard to ignore, and in this case it amounts to $300 in favor of the iPhone 15. The value question is simple: are a 120 Hz display instead of 60 Hz and 13 h more rated video playback worth $300 to you? If so, the iPhone 17 Pro makes sense.
All prices are official US launch prices, last checked September 2025. Actual prices at stores may differ.
Which One Should You Buy?
Choose the iPhone 15 if…
- you want the lighter phone (6.03 oz vs 7.27 oz)
- you care about a thin profile in your pocket (0.31 in vs 0.34 in)
- you want the lower price and can live with the trade-offs ($300 less)
Choose the iPhone 17 Pro if…
- you want smoother scrolling (120 Hz vs 60 Hz)
- you want the longer rated endurance (33 h vs 20 h)
- you want more storage without paying for an upgrade (256 GB vs 128 GB)
- you want the screen that stays readable on sunny days (3,000 nits vs 2,000 nits)
- you find that the improvements in the iPhone 17 Pro match what you need
Also Compared
Frequently Asked Questions
Should I buy the iPhone 15 or the iPhone 17 Pro?
The iPhone 17 Pro wins more of the areas we compared, so it’s the safer pick unless what you want most is a 1.23 oz lighter build.
Should I upgrade from the iPhone 15 to the iPhone 17 Pro?
It’s one of the more worthwhile generational jumps: the iPhone 17 Pro offers a 120 Hz display instead of 60 Hz, 13 h more rated video playback and 256 GB of base storage instead of 128 GB compared with the iPhone 15.
Does the iPhone 15 last longer on a charge than the iPhone 17 Pro?
The iPhone 17 Pro does better here. It lists 33 h for rated video playback, while the iPhone 15 lists 20 h.
Is the iPhone 15 bigger than the iPhone 17 Pro?
Neither by much. The iPhone 15 and the iPhone 17 Pro have nearly identical dimensions.
Does the iPhone 15 perform better than the iPhone 17 Pro?
The iPhone 17 Pro should be the quicker of the two, with a newer 3 nm chip process on its side.
Which has the better camera, the iPhone 15 or the iPhone 17 Pro?
On paper, the iPhone 17 Pro has the stronger camera setup, with an extra rear camera and a sharper 48 MP ultra-wide.
Executive Summary
The iPhone 15 and the iPhone 17 Pro sit next to each other in the same lineup. Here’s my honest read on which one makes more sense. Here’s what matters most to me: the iPhone 17 Pro offers a 120 Hz display instead of 60 Hz. Stack 13 h more rated video playback on top of that, and the iPhone 17 Pro’s lead grows. Where the iPhone 15 fights back is a 1.23 oz lighter build.
If portability is your thing, the iPhone 15 fits. If display matters more, the iPhone 17 Pro makes more sense.
My pick: the iPhone 17 Pro. The iPhone 15 only comes out ahead if you need a 1.23 oz lighter build, which only the iPhone 15 offers.
Personal opinion based on the data above. Your priorities may differ.