Xiaomi 15 Ultra vs Samsung Galaxy S25 Ultra
This article analyzes the two leading flagships of 2025 by presenting complete specifications along with performance evaluations and actual uses information.
Comparison Contents
Phones Overview
Xiaomi 15 Ultra
The Xiaomi 15 Ultra stands as a top-tier photography device which incorporates Leica quad-camera technologies featuring a 1-inch sensor type and provides ultra-fast 90W wired along with 80W wireless charging speeds.
Samsung Galaxy S25 Ultra
The Galaxy S25 Ultra serves as Samsung's flagship handset because it provides its 200MP main camera alongside S Pen functionality and exclusive 7-year support guarantees while sporting a stylish tin-based body.
Design & Build
| 161.3 x 75.3 x 9.4 mm (6.35 x 2.96 x 0.37 in) | 162.8 x 77.6 x 8.2 mm (6.41 x 3.06 x 0.32 in) | |
| 226g (Global) / 229g (China) | 218g | |
| Aerospace-grade glass fiber frame, aluminum alloy middle frame, glass back (Gorilla Glass Victus 2) | Metal frame, glass back | |
| Black, White, Silver Chrome, Green | Black, Silver, Gray, Blue | |
| IP68 dust and water resistance (1.5 meters for 30 minutes) | IP68 dust and water resistance | |
| Xiaomi IceLoop 2.0 Vapor Chamber (11,915 mm²), 316L stainless steel frame | Vapor chamber | |
| Not supported | S Pen included (built-in slot) |
Display
| 6.73-inch LTPO AMOLED | 6.9-inch Dynamic AMOLED | |
| 1440 x 3200 pixels, 522 ppi | 1440 x 3120 pixels, 498 ppi | |
| 120Hz adaptive (1-120Hz) | 120Hz adaptive (1-120Hz) | |
| 3200 nits peak | 2600 nits peak | |
| HDR10+, Dolby Vision, HDR Vivid | HDR10+ | |
| Xiaomi Shield Glass 2.0, Gorilla Glass Victus 2 | Corning Gorilla Armor 2 | |
| Ultrasonic in-display fingerprint sensor (4th generation) | Ultrasonic in-display fingerprint sensor | |
| Not specified | 92.4% |
Performance
| Qualcomm Snapdragon 8 Elite (3 nm) | Qualcomm Snapdragon 8 Elite (3 nm) | |
| Octa-core (2x 4.32 GHz Oryon Phoenix L + 6x 3.53 GHz Oryon Phoenix M) | Octa-core (2x 4.32 GHz Oryon Phoenix L + 6x 3.53 GHz Oryon Phoenix M) | |
| Adreno 830 | Adreno 830 | |
| 12GB/16GB LPDDR5X (5333 MHz) | 12GB/16GB LPDDR5X (5333 MHz) | |
| 256GB/512GB/1TB UFS 4.1 | 256GB/512GB/1TB UFS 4.0 | |
| Hexagon Neural Engine | Hexagon Neural Engine | |
| 2,742,399 | 2,795,139 | |
| 3,008 (Single), 9,065 (Multi) | 3,147 (Single), 9,750 (Multi) |
Camera System
| 50MP, f/1.6, 23mm, 1.0"-type sensor, OIS, Dual Pixel PDAF | 200MP, f/1.7, 23mm, 1/1.3" sensor, OIS, Phase PDAF | |
| 50MP, f/1.8, 70mm, 3x Optical Zoom, OIS | 50MP, f/3.4, 111mm, 5x Optical Zoom, OIS | |
| 200MP, f/2.6, 100mm, 4.3x Optical Zoom, OIS | 12MP (specifications not fully detailed) | |
| 50MP, f/2.2, 14mm, 115° FOV | 50MP, f/1.9, 13mm, 120° FOV | |
| 8K@30fps, 4K@120fps | 8K@30fps, 4K@120fps | |
| 32MP, f/2.0, 21mm, 4K@60fps | 12MP, f/2.2, 26mm, 4K@60fps | |
| Leica co-engineered, Leica color modes (Authentic, Vibrant), Master lens filters, Raw capture (DNG format) | Bokeh mode, Pro mode, RAW support |
Battery & Charging
| 5410 mAh (Global) / 6000 mAh (China) | 5000 mAh | |
| 90W (0-100% in 35 minutes) | 45W (72% in 30 min, full in 59 min) | |
| 80W wireless | 25W wireless | |
| 10W reverse wireless | Reverse wireless (power not specified) | |
| Up to 15 hours | 8:35 hours | |
| Up to 22 hours | 16:40 hours | |
| Not specified | 6:40 hours | |
| Up to 28 days | 165 hours (≈ 6.9 days) |
OS & Software
| Android 15 | Android 15 | |
| HyperOS 2 | One UI 7.0 | |
| 4 years of Android OS updates | 7 years of Android OS updates | |
| 6 years of security updates | 7 years of security updates | |
| HyperAI, AI Image Generator, AI Subtitles, AI Eraser, AI Writing Assistant | Galaxy AI suite including Circle to Search, Live Translate, Photo Assist | |
| Not specified | 30.4 GB | |
| Second Space (secure profile), Game Turbo optimization | Samsung DeX (desktop mode), S Pen functionality, Secure Folder |
Audio & Multimedia
| Stereo speakers, Dolby Atmos | Stereo speakers, Dolby Atmos | |
| No 3.5mm headphone jack | No 3.5mm headphone jack | |
| Hi-Res Audio certified (24-bit/192kHz), Hi-Res Wireless Audio, Qualcomm XPAN Audio | Not specified | |
| Triple microphone array | Not specified | |
| No | No | |
| H.264, H.265 (HEVC), VP9, AV1 codecs | Not specified |
Connectivity
| Wi-Fi 7 (802.11be) | Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be) | |
| Bluetooth 6.0, A2DP, LE, aptX HD, LDAC, LHDC | Bluetooth 5.4, LE | |
| GPS (L1+L5 Dual-Band), GLONASS, BDS, GALILEO, QZSS, NavIC | GPS, GLONASS, Beidou, Galileo, QZSS | |
| Yes | Yes | |
| Yes | Yes | |
| Two-way satellite communication | Not specified | |
| Yes | No | |
| USB Type-C 3.2 Gen 2, DisplayPort | USB Type-C 3.2, DisplayPort 1.2 | |
| Nano-SIM + Nano-SIM, eSIM | Nano-SIM, eSIM |
Pros & Cons
Pros
- Superior 1-inch type main camera sensor with Leica co-engineering
- Exceptionally fast charging (90W wired, 80W wireless)
- Higher peak brightness (3200 nits)
- Larger battery capacity, especially in Chinese variant (6000 mAh)
- Advanced cooling system with larger vapor chamber
- Support for Dolby Vision and more HDR formats
Cons
- Thicker design (9.4mm vs 8.2mm)
- Shorter software update commitment (4 years vs 7 years)
- No built-in stylus support
- HyperOS has more bloatware than One UI
- Slightly lower benchmark scores
- Higher starting price
Pros
- Industry-leading 7-year software update policy
- Integrated S Pen functionality
- Samsung DeX desktop mode support
- Thinner and lighter design
- Higher benchmark scores
- Gorilla Armor 2 glass protection
- More color options
Cons
- Slower charging speeds (45W wired, 25W wireless)
- Lower peak brightness (2600 nits vs 3200 nits)
- Smaller battery capacity (5000 mAh)
- No infrared port
- Less advanced audio capabilities
- Fewer camera features compared to Leica system
Conclusion
Which Phone Should You Buy?
The top Android flagship smartphones of 2025 include Xiaomi 15 Ultra alongside Samsung Galaxy S25 Ultra which dominate distinct categories of performance. The final decision between these phones should stem from individual preferences and necessary requirements.:
Choose the Xiaomi 15 Ultra if you:
- Prioritize camera quality and photography features
- Need the fastest possible charging (both wired and wireless)
- Want the brightest display available on a smartphone
- Value audio quality and specialized audio features
- Prefer a larger battery for extended usage
- Need the infrared port for remote control functionality
Choose the Samsung Galaxy S25 Ultra if you:
- Want the longest software support (7 years of updates)
- Need S Pen functionality for notes and drawings
- Prefer a slightly thinner and lighter design
- Use productivity features like Samsung DeX
- Want slightly better raw performance
- Prefer One UI's more refined software experience
IWhen evaluating specifications alone the devices receive equal ratings at 94 out of 100 thereby sharing first place in the Android flagship category for 2025. Your individual preferences should determine which device between the Xiaomi 15 Ultra and Mi 11 Ultimate you choose even though the Xiaomi 15 Ultra performs slightly better based on our opinion.
Feature Ratings
Final Scores
Xiaomi 15 Ultra
Xiaomi 15 Ultra stands out in its category because of its impressive camera functions and super-fast charging together with its brilliant screen and powerful battery. A perfect flagship option exists for users seeking both top-notch photography capabilities and rapid charging capabilities and splendid display features.
Samsung Galaxy S25 Ultra
Samsung Galaxy S25 Ultra leads the market through its exceptional software support features and S Pen capabilities and improved benchmark results. The device caters best to productivity professionals and users seeking extended software service due to its prime benchmark and S Pen integration capabilities.
Overall Winner
The Xiaomi 15 Ultra superior camera setup and faster charging technology combined with extended battery operation make it a better choice over the Samsung Galaxy Z Fold4. Power users and photography enthusiasts will prioritize this device because its Leica 1-inch type camera sensor and 90W rapid charging operation together with its bright display.
Users who demand software updates and SPen capabilities together with a slender body should choose the Samsung Galaxy S25 Ultra over other options on the market.