Here’s a detailed comparison between the Xiaomi 15 Ultra and the Samsung Galaxy S25 Ultra.
📑 Table of Contents:
- 📏 Size Comparison
- 🖥️ Display Comparison
- 🔋 Battery Life
- ⚡ Charging Speed
- 🔊 Speaker Test
- 🚀 Performance
- 📊 Benchmark Performance
- 📸 Camera Comparison
- 🎥 Video Quality
- 🏆 Overall Verdict
📏 Size Comparison
| Feature | Xiaomi 15 Ultra | Samsung Galaxy S25 Ultra |
|---|
| Dimensions | Approx. 163.7 x 74.6 x 9.5 mm | Approx. 163.4 x 78.1 x 8.9 mm |
| Weight | Approx. 230g | Approx. 228g |
| Display Size | 6.81 inches | 6.8 inches |
| Display Type | AMOLED, 120Hz refresh rate | Dynamic AMOLED 2X, 120Hz refresh rate |
| Screen-to-Body Ratio | ~90% | ~90% |
| Build Material | Glass front and back, aluminum frame | Glass front and back, titanium frame |
| IP Rating | IP68 | IP68 |
| Color Options | Black, White, Green | Phantom Black, Cream, Green, Burgundy |
| In-Hand Feel | Slightly thicker but ergonomic | Slimmer and slightly wider |
🖥️ Display Comparison
| Feature | Xiaomi 15 Ultra | Samsung Galaxy S25 Ultra |
|---|
| Display Size | 6.81 inches | 6.8 inches |
| Display Type | AMOLED, LTPO | Dynamic AMOLED 2X, LTPO |
| Resolution | 3200 x 1440 pixels (QHD+) | 3088 x 1440 pixels (QHD+) |
| Refresh Rate | 1-120Hz adaptive | 1-120Hz adaptive |
| Brightness | Up to 2600 nits (peak) | Up to 2500 nits (peak) |
| HDR Support | Dolby Vision, HDR10+ | HDR10+, Dolby Vision |
| Protection | Corning Gorilla Glass Victus 2 | Corning Gorilla Glass Victus 3 |
| Color Accuracy | 10-bit, DCI-P3 | 10-bit, DCI-P3 |
| Always-On Display | Yes | Yes |
| Curved Display | Slightly curved | Slightly curved |
🔋 Battery Life
| Feature | Xiaomi 15 Ultra | Samsung Galaxy S25 Ultra |
|---|
| Battery Capacity | 5,500 mAh | 5,400 mAh |
| Charging Speed | 120W wired fast charging, 80W wireless | 45W wired fast charging, 15W wireless |
| Charging Time | ~20 minutes (0-100% with wired) | ~60 minutes (0-100% with wired) |
| Battery Optimization | AI-based power management, HyperOS optimizations | AI-based power management, One UI optimizations |
| Screen-on Time (SOT) | ~8-10 hours (typical usage) | ~7-9 hours (typical usage) |
| Standby Time | Up to 2 days | Up to 2 days |
| Power-Saving Modes | Ultra Battery Saver, Customizable modes | Super Power Saving, Adaptive Battery |
| Reverse Charging | 10W reverse wireless charging | 4.5W reverse wireless charging |
| Durability | Long-lasting with advanced battery health tech | Long-lasting with adaptive battery health |
⚡ Charging Speed
| Feature | Xiaomi 15 Ultra | Samsung Galaxy S25 Ultra |
|---|
| Wired Charging Speed | 120W HyperCharge | 45W Super Fast Charging 2.0 |
| Wireless Charging | 50W Wireless Charging | 15W Wireless Charging |
| Reverse Charging | 10W Reverse Wireless Charging | 4.5W Reverse Wireless Charging |
| Battery Capacity | 5,000 mAh | 5,000 mAh |
| Charging Time (0-100%) | ~18 minutes (with 120W charger) | ~60 minutes (with 45W charger) |
| Charging Technology | Dual-cell battery with advanced cooling | Single-cell battery with optimized charging |
| Adapter Included | Yes (120W charger in the box) | No (charger sold separately) |
| Efficiency | High efficiency with minimal heat generation | Standard efficiency with heat management |
🔊 Speaker Test
| Feature | Xiaomi 15 Ultra | Samsung Galaxy S25 Ultra |
|---|
| Speaker Configuration | Stereo speakers (top and bottom) | Stereo speakers (tuned by AKG) |
| Audio Output | High-fidelity sound with Dolby Atmos support | High-fidelity sound with Dolby Atmos support |
| Loudness | Excellent (balanced sound at high volumes) | Excellent (louder with deeper bass) |
| Clarity | Clear mids and highs | Clear mids, highs, and enhanced bass |
| Bass Performance | Good (balanced bass) | Excellent (deep and punchy bass) |
| 3D Spatial Audio | Supported | Supported (with head tracking) |
| Audio Customization | Custom EQ settings | Custom EQ settings with Adapt Sound |
| Speaker Durability | Durable design with water resistance | Durable design with IP68 water resistance |
| AI Enhancements | AI-based sound optimization | AI-based sound optimization |
| Additional Features | Dual speakers with spatial audio | AKG-tuned speakers with Dolby Atmos |
🚀 Performance
| Feature | Xiaomi 15 Ultra | Samsung Galaxy S25 Ultra |
|---|
| Processor | Qualcomm Snapdragon 8 Gen 4 (4nm) | Exynos 2400 / Snapdragon 8 Gen 4 (4nm) |
| GPU | Adreno 750 | Xclipse 940 / Adreno 750 |
| RAM | 12GB / 16GB LPDDR5X | 12GB / 16GB LPDDR5X |
| Storage | 256GB / 512GB / 1TB UFS 4.0 | 256GB / 512GB / 1TB UFS 4.0 |
| Cooling System | Vapor Chamber Cooling | Advanced Cooling System |
| Benchmark Scores | ~1,800,000 (Antutu v10) | ~1,750,000 (Antutu v10) |
| AI Processing | Hexagon DSP with AI Engine | NPU with AI Engine |
| 5G Support | Yes (Sub-6GHz and mmWave) | Yes (Sub-6GHz and mmWave) |
| Software | Xiaomi HyperOS (Based on Android 15) | One UI 7 (Based on Android 15) |
| Gaming Performance | Excellent (High frame rates in AAA titles) | Excellent (Optimized for gaming) |
📊 Benchmark Performance
🔹 GeekBench 6
| Device | Single-Core Score | Multi-Core Score |
|---|
| Xiaomi 15 Ultra | 2,150 | 6,800 |
| Samsung Galaxy S25 Ultra | 2,180 | 6,850 |
🔹 AnTuTu 10
| Device | Total Score |
|---|
| Xiaomi 15 Ultra | 1,250,000 |
| Samsung Galaxy S25 Ultra | 1,230,000 |
🔹 3DMark
| Device | Graphics Score |
|---|
| Xiaomi 15 Ultra | 9,500 |
| Samsung Galaxy S25 Ultra | 9,300 |
📸 Camera Comparison
| Feature | Xiaomi 15 Ultra | Samsung Galaxy S25 Ultra |
|---|
| Rear Camera Setup | Quad: 50 MP (main), 50 MP (ultrawide), 50 MP (telephoto), 50 MP (periscope) | Quad: 200 MP (main), 50 MP (ultrawide), 50 MP (telephoto), 50 MP (periscope) |
| Front Camera | 32 MP | 40 MP |
| Main Sensor | 1-inch Sony IMX989 | 200 MP ISOCELL HP2 |
| Zoom Capabilities | 5x optical, 120x digital | 10x optical, 100x digital |
| Aperture | f/1.6 (main), f/2.2 (ultrawide), f/3.0 (telephoto) | f/1.7 (main), f/2.2 (ultrawide), f/4.9 (telephoto) |
| Video Resolution | Up to 8K @ 30fps | Up to 8K @ 30fps |
| Stabilization | OIS + EIS (Advanced stabilization) | OIS + EIS (Advanced stabilization) |
| HDR Video | Dolby Vision HDR | HDR10+ |
| Low-Light Performance | Excellent (with AI Night Mode 2.0) | Excellent (with Super Night Mode) |
| AI Features | AI Cinema Mode, AI Tracking, AI Color Grading | AI Scene Optimizer, Super Resolution, Object Eraser |
| Software Enhancements | Xiaomi HyperOS camera optimizations | Samsung One UI camera optimizations |
🎥 Video Quality
| Feature | Xiaomi 15 Ultra | Samsung Galaxy S25 Ultra |
|---|
| Rear Camera Setup | Quad: 50 MP (main), 50 MP (ultrawide), 50 MP (telephoto), 50 MP (periscope) | Quad: 200 MP (main), 12 MP (ultrawide), 50 MP (telephoto), 50 MP (periscope) |
| Front Camera | 32 MP | 40 MP |
| Video Resolution | Up to 8K @ 30fps | Up to 8K @ 30fps |
| Stabilization | OIS + EIS (Advanced stabilization) | OIS + EIS (Advanced Super Steady) |
| HDR Video | Dolby Vision HDR | HDR10+ |
| Slow Motion | 1080p @ 960fps, 4K @ 120fps | 1080p @ 960fps, 4K @ 120fps |
| Low-Light Performance | Excellent (with larger sensor and AI Night Mode 2.0) | Excellent (with enhanced Nightography) |
| AI Features | AI Cinema Mode, AI Tracking, AI Color Grading | AI-based Object Recognition, Auto Framing |
| Audio Quality | Stereo recording with spatial audio | Stereo recording with 3D Audio Capture |
| Software Enhancements | Xiaomi HyperOS camera optimizations | Samsung One UI camera optimizations |
🏆 Overall Verdict
🔹 Pros
✅ Xiaomi 15 Ultra:
- ⚡ Faster Charging – 90W wired and 50W wireless charging outperforms the Galaxy S25 Ultra.
- 🔋 Larger Battery – 5,410mAh vs. 5,000mAh for better endurance.
- 🌞 Brighter Display – 3,200 nits peak brightness vs. 2,500 nits for improved outdoor visibility.
- 📊 Higher Benchmark Scores – Slightly better performance in AnTuTu and 3DMark tests.
- 📸 Bigger Periscope Zoom Sensor – 200MP periscope camera for enhanced zoom clarity.
✅ Samsung Galaxy S25 Ultra:
- 📱 S Pen Integration – Unique productivity and creative tool not available on the Xiaomi 15 Ultra.
- 📸 200MP Main Camera – Higher resolution for more detailed shots.
- 💎 Longer Software Support – Samsung typically offers 4+ years of major updates.
- 🔍 Better Optical Zoom – 5x optical zoom vs. 4.8x on the Xiaomi 15 Ultra.
- 🎥 More Refined Video Recording – Historically stronger video processing and stabilization.
🔹 Cons
❌ Xiaomi 15 Ultra:
- ⚖️ Heavier & Thicker – Slightly bulkier due to battery and camera setup.
- 💰 Availability – May not be as widely available in global markets as Samsung.
- 📸 Slightly Lower Resolution Main Camera – 50MP vs. 200MP on the Galaxy S25 Ultra.
❌ Samsung Galaxy S25 Ultra:
- ⚡ Slower Charging – 45W wired, 15W wireless charging lags behind Xiaomi.
- 🔋 Smaller Battery – 5,000mAh vs. 5,410mAh on the Xiaomi 15 Ultra.
- 🌞 Lower Peak Brightness – 2,500 nits vs. 3,200 nits, affecting outdoor readability.
