Galaxy S26+ vs Xiaomi 17 Ultra
Two brands, one target. The Galaxy S26+ from Samsung and the Xiaomi 17 Ultra from Xiaomi compete head to head for flagship smartphone shoppers. Look at the scorecard and the Xiaomi 17 Ultra stands out, ahead in 3 of 4 areas. The performance numbers explain a lot of that.
At a glance
- Performance Xiaomi 17 Ultra wins
- Memory & Storage Xiaomi 17 Ultra wins
- Camera Tie
- Battery & Charging Xiaomi 17 Ultra wins
Key Differences
-
The Xiaomi 17 Ultra has 4 GB more RAM
On ram, the Xiaomi 17 Ultra posts 16 GB against 12 GB for the Galaxy S26+, a gap big enough to feel in everyday use. Opening a single app, you won’t feel the difference. With lots of tabs, a game and the camera in rotation, the Xiaomi 17 Ultra has more room to work with.
-
The Xiaomi 17 Ultra has 22% more battery capacity
This is one of the widest gaps in the whole comparison: 6,000 mAh for the Xiaomi 17 Ultra versus 4,900 mAh for the Galaxy S26+. Capacity isn’t everything, but when two phones are otherwise close, more milliamp-hours is the simplest endurance advantage there is.
-
The Xiaomi 17 Ultra has 512 GB of base storage instead of 256 GB
The Galaxy S26+ lists 256 GB; the Xiaomi 17 Ultra comes in at 512 GB. That’s not a rounding error. The Xiaomi 17 Ultra starts with more room, which means fewer “storage full” warnings and less time deleting old videos.
-
The Xiaomi 17 Ultra has a tougher IP68/IP69 rating
The difference is minor (IP68/IP69 against IP68), but if you’re splitting hairs, the Xiaomi 17 Ultra wins it. Ratings describe lab conditions, and water damage is often excluded from warranties, so treat this as insurance rather than an invitation.
Design & Size
The Xiaomi 17 Ultra has the bigger footprint. That can mean more room to work with, but also more to carry, park or pocket.
Design & Build
| Spec | Galaxy S26+ | Xiaomi 17 Ultra |
|---|---|---|
| Height | N/A (not specified) | 6.41 in |
| Width | N/A (not specified) | 3.06 in |
| Thickness | N/A (not specified) | 0.33 in |
| Weight | N/A (not specified) | 7.69 oz |
| Water & dust rating | IP68 | IP68/IP69 (winner) |
| Frame | N/A (not specified) | Aluminum |
Display
Here the spec sheet speaks in model names and types. Compare the Galaxy S26+ and the Xiaomi 17 Ultra row by row in the table below.
Performance
Xiaomi 17 Ultra leads
The Xiaomi 17 Ultra wins the performance section decisively. Here the Xiaomi 17 Ultra offers 4 GB more RAM. Extra memory also gives the Xiaomi 17 Ultra more headroom for heavier apps and for software updates in the years ahead. The takeaway: on performance, the Xiaomi 17 Ultra is the stronger phone.
RAM
Galaxy S26+: 12 GB Xiaomi 17 Ultra: 16 GB More RAM lets a phone keep more apps open in the background, so switching back to them is instant instead of a reload.
Memory & Storage
Xiaomi 17 Ultra leads
For memory & storage, the verdict is easy: the Xiaomi 17 Ultra leads, and not by a little. The Xiaomi 17 Ultra brings 512 GB of base storage instead of 256 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. Bottom line for memory & storage: the Xiaomi 17 Ultra has the edge.
Base storage
Galaxy S26+: 256 GB Xiaomi 17 Ultra: 512 GB 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.
Camera
Too close to call
Swap one for the other and you’d lose nothing on camera. Don’t let camera decide this one; look at the other sections instead.
Battery & Charging
Xiaomi 17 Ultra leads
Here the Xiaomi 17 Ultra opens up one of its biggest leads in the comparison. The Xiaomi 17 Ultra steps ahead thanks to 22% more battery capacity. A bigger battery usually means longer days between charges, although chip efficiency and screen size also shape real endurance. That makes the Xiaomi 17 Ultra the natural choice for buyers focused on battery & charging.
Battery capacity
Galaxy S26+: 4,900 mAh Xiaomi 17 Ultra: 6,000 mAh Extra capacity also ages better: after a few years of charge cycles, the Xiaomi 17 Ultra has more headroom left.
Software & Updates
There isn’t a number to compare on software & updates, just names. Look at the rows below to see how the Galaxy S26+ and the Xiaomi 17 Ultra differ.
Full Specifications
Display
| Spec | Galaxy S26+ | Xiaomi 17 Ultra |
|---|---|---|
| Screen size | 6.7 in | 6.9 in |
| Panel type | Dynamic AMOLED 2X | LTPO AMOLED |
| Resolution | N/A (not specified) | 2608 x 1200 |
| Refresh rate | N/A (not specified) | 120 Hz |
| Peak brightness | N/A (not specified) | 3,500 nits |
| Always-on display | Yes | N/A (not specified) |
Performance
| Spec | Galaxy S26+ | Xiaomi 17 Ultra |
|---|---|---|
| Chipset | Snapdragon 8 Elite Gen 5 for Galaxy (US) | Snapdragon 8 Elite Gen 5 |
| CPU cores | N/A (not specified) | 8 |
| Process node | N/A (not specified) | 3 nm |
| RAM | 12 GB | 16 GB (winner) |
Memory & Storage
| Spec | Galaxy S26+ | Xiaomi 17 Ultra |
|---|---|---|
| Base storage | 256 GB | 512 GB (winner) |
| Max storage | N/A (not specified) | 1 TB |
| microSD slot | No | No |
Camera
| Spec | Galaxy S26+ | Xiaomi 17 Ultra |
|---|---|---|
| Main camera | 50 MP | 50 MP |
| Ultra-wide camera | N/A (not specified) | 50 MP |
| Telephoto camera | N/A (not specified) | 200 MP |
| Optical zoom | N/A (not specified) | 4.3× |
| Rear cameras | N/A (not specified) | 3 |
| Front camera | N/A (not specified) | 50 MP |
| Max video | N/A (not specified) | 8K30 |
Battery & Charging
| Spec | Galaxy S26+ | Xiaomi 17 Ultra |
|---|---|---|
| Battery capacity | 4,900 mAh | 6,000 mAh (winner) |
| Wired charging | N/A (not specified) | 90 W |
| Wireless charging | N/A (not specified) | 50 W |
| Port | USB-C | USB-C (USB 3.2 Gen 2) |
Software & Updates
| Spec | Galaxy S26+ | Xiaomi 17 Ultra |
|---|---|---|
| OS at launch | Android 16 (One UI 8.5) | HyperOS 3 (Android 16) |
| Promised OS updatesManufacturer commitment | 7 years | N/A (not specified) |
Design & Build
| Spec | Galaxy S26+ | Xiaomi 17 Ultra |
|---|---|---|
| Height | N/A (not specified) | 6.41 in |
| Width | N/A (not specified) | 3.06 in |
| Thickness | N/A (not specified) | 0.33 in |
| Weight | N/A (not specified) | 7.69 oz |
| Water & dust rating | IP68 | IP68/IP69 (winner) |
| Frame | N/A (not specified) | Aluminum |
“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.
Which One Should You Buy?
Choose the Galaxy S26+ if…
- you value compactness over sheer size
- you’re loyal to Samsung and happy with it
Choose the Xiaomi 17 Ultra if…
- you keep lots of apps open at once (16 GB vs 12 GB of RAM)
- you want the bigger battery (6,000 mAh vs 4,900 mAh)
- you shoot a lot of photos and video (512 GB vs 256 GB base storage)
- you want better protection against water and dust (IP68/IP69 vs IP68)
Also Compared
Frequently Asked Questions
Should I buy the Galaxy S26+ or the Xiaomi 17 Ultra?
On the specs compared here, the Xiaomi 17 Ultra makes more sense for most buyers; the Galaxy S26+ doesn’t win a single measurable area.
Which has better battery life, the Galaxy S26+ or the Xiaomi 17 Ultra?
The Xiaomi 17 Ultra does better here. It lists 6,000 mAh for battery capacity, while the Galaxy S26+ lists 4,900 mAh.
Which is larger, the Galaxy S26+ or the Xiaomi 17 Ultra?
Going by the official dimensions, the Xiaomi 17 Ultra is the larger one: 6.41 × 3.06 × 0.33 in against the Galaxy S26+’s 6.7 in.
Does the Galaxy S26+ perform better than the Xiaomi 17 Ultra?
Going by the specs, the Xiaomi 17 Ultra comes out ahead: it offers 4 GB more RAM.
Does the Galaxy S26+ have more storage than the Xiaomi 17 Ultra?
Going by the spec sheets, the Xiaomi 17 Ultra has the larger figure: 512 GB, against 256 GB.
Executive Summary
The Galaxy S26+ and the Xiaomi 17 Ultra come from rival camps, Samsung and Xiaomi, but they’re chasing the same person: you. In daily life, I think the first difference you’d notice is 4 GB more RAM, and that goes to the Xiaomi 17 Ultra. There’s a bonus as well: the Xiaomi 17 Ultra has 22% more battery capacity.
For the things a spec sheet can’t capture, the Galaxy S26+ fits better. For performance, the Xiaomi 17 Ultra is the better match.
My pick: the Xiaomi 17 Ultra.
Personal opinion based on the data above. Your priorities may differ.