Samsung Galaxy S23 Ultra vs Xiaomi 15S Pro

Verdict

Samsung Galaxy S23 Ultra and Xiaomi 15S Pro tie on the OH Rank at a score of 72. Samsung Galaxy S23 Ultra wins on Selfie and Video; Xiaomi 15S Pro wins on Performance and Battery. Samsung Galaxy S23 Ultra is 2.8mm wider than Xiaomi 15S Pro. Xiaomi 15S Pro is the more recent release, from May 22, 2025.

Score Breakdown

Category

Samsung Galaxy S23 Ultra

78.1mm (3.07in) · Feb 2023 · Rank #74

Xiaomi 15S Pro

75.3mm (2.96in) · May 22, 2025 · Rank #65
Performance /15
7
11
Battery /15
8
11
Screen /15
13
15
IP Protection /15
12
12
Main Camera /15
12
12
Selfie /5
5
3
Video /5
5
3
SD Memory /5
0
0
Software /5
5
5
Desktop Replacement /5
5
0
TOTAL
72
72
Samsung Galaxy S23 Ultra
78.1mm (3.07in) · Feb 2023 · Rank #74
7+8+13+12+12+5+5+0+5+5 = 72
* BEST phone Spring Summer 2023

EDITORIAL: A fantastic value considering that it differs from S24 Ultra by a small, incremental downgrade in processing speed, screen reflection and minor photo deficiencies. And it is smaller (easier to use) than the S24 Ultra. Samsung still promises 4 more years of OS updates making this one of the best options if you don’t want to spend much.

PROs
fast SD 8 Gen 2 with UFS4.0 performance, 500ppi screen, great cameras: 200MP main + 2 x 10MP tele + 12MP ultrawide all with PDAF and a 12MP selfie with PDAF too!, Samsung’s mature and feature rich software and a full-blown best-on-the-market desktop replacement functionality
CONs
big 234gr phone, less than 24-hour battery life, no memory expansion and Samsung’s persistent effort to lock you into their ecosystem (updated Apr 13, 2025)
Xiaomi 15S Pro
75.3mm (2.96in) · May 22, 2025 · Rank #65
11+11+15+12+12+3+3+0+5+0 = 72
FLY* TOP Software

EDITORIAL: Featuring Xiaomi's own processor, the 15S Pro marks a beginning of a new era. Unlike Huawei's Kirin chips, the new XRing 01 is a proper 3nm top-of-the-line processor that should compete head on with SD 8 Elite and Mediatec's top Dimensity 9400. Xiaomi wants to impress: all-day battery, excellent screen, powerful cameras, even the Display Port is there.

PROs
expect fast performance with UFS 4.1 memory, >30hr endurance from a 6100mAh Si battery with sub-60min 90W (50W wireless) charging, >1300 >520ppi LTPO AMOLED with Dolby Vision screen, IP68 protection, reliable 50MP 23mm main + 50MP 120mm periscope telephoto (both OIS PDAF)+ 50MP 14mm AF ultrawide setup, average 32MP 22mm (non AF) selfie, okay video recording, 4 years of OS updates and fast USB-C 3.2 Gen 2 port with DisplayPort and OTG
CONs
no AF on selfie, no expandable memory or desktop replacement functionality

Both phones here were scored by me, using the same ten categories, with no ads, sponsorships, or manufacturer relationships — this comparison is as objective and honest as it gets.

Visit Home page to compare world's best phones. You can see scoring and ranking explained on the About page.