Realme 15x vs Samsung Galaxy S25 Ultra
The Realme 15x (2025) runs on the MediaTek Dimensity 6300, while the Samsung Galaxy S25 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $250 and $1299. By overall MobileRank rating, the Samsung Galaxy S25 Ultra leads — 80/100 vs 51/100 (a 29-point difference). Key differences: the Realme 15x has the bigger battery (7000 mAh vs 5000); the main camera is 50 MP vs 200 MP; the Samsung Galaxy S25 Ultra is faster in AnTuTu (3,128,552 vs 528,398); the Samsung Galaxy S25 Ultra has NFC for contactless payments, the Realme 15x doesn't.
Profile comparison
Category scores
Realme 15x
Samsung Galaxy S25 Ultra
What makes Realme 15x better?
- Bigger battery: 7000 vs 5000 mAh
- Faster charging: 60W vs 45W
- Higher refresh rate: 144Hz vs 120Hz
- Lighter: 212g vs 218g
- Cheaper at launch: $250 vs $1299
- Longer battery life (75/100 vs 56/100)
- Better portability (49/100 vs 46/100)
What makes Samsung Galaxy S25 Ultra better?
- Higher AnTuTu: 3128552 vs 528398
- Better Geekbench Single: 3100 vs 771
- Better Geekbench Multi: 9760 vs 1980
- Better main camera: 200MP vs 50MP
- Higher performance (92/100 vs 43/100)
- Better camera (81/100 vs 40/100)
- Better display (88/100 vs 65/100)
Comparison verdict
Comparing the Realme 15x vs the Samsung Galaxy S25 Ultra, the Samsung Galaxy S25 Ultra scores 29 points higher (80/100 vs 51/100). In the "performance" category, the Samsung Galaxy S25 Ultra leads (92/100 vs 43/100). In the "camera" category, the Samsung Galaxy S25 Ultra leads (81/100 vs 40/100). In the "battery" category, the Realme 15x leads (75/100 vs 56/100). Value score: Realme 15x — 52/100, Samsung Galaxy S25 Ultra — 70/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Samsung Galaxy S25 Ultra significantly outperforms the Realme 15x (92/100 vs 43/100). In the "display" category, the Samsung Galaxy S25 Ultra notably outperforms the Realme 15x (88/100 vs 65/100). In the "camera" category, the Samsung Galaxy S25 Ultra significantly outperforms the Realme 15x (81/100 vs 40/100). In the "battery" category, the Realme 15x notably outperforms the Samsung Galaxy S25 Ultra (75/100 vs 56/100). In the "portability" category, the Realme 15x and the Samsung Galaxy S25 Ultra are nearly equal (49/100 vs 46/100).
Specs comparison
| Specification | Realme 15x | Samsung Galaxy S25 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6300 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 528398 | 3128552 | |
| Geekbench Single | 771 | 3100 | |
| Geekbench Multi | 1980 | 9760 | |
| Display | 6.8" IPS LCD | 6.9" Dynamic AMOLED 2X | |
| Resolution | 720x1570 | 3120x1440 | |
| Refresh rate | 144 Hz | 120 Hz | |
| Battery | 7000 mAh | 5000 mAh | |
| Charging | 60W | 45W | |
| Wireless charging | — | 15W | |
| DXOMark (camera) | — | 151 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 50 MP | 12 MP | |
| RAM | 6GB / 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 15 | Android 15 / One UI 7 | |
| Brightness (peak) | 1200 nits | 2600 nits | |
| NFC | no | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 166.1×77.9×8.3 mm | 162.8×77.6×8.2 mm | |
| Weight | 212 g | 218 g | |
| Launch price | $250 | $1299 |
Camera comparison
Realme 15x
- Main: 50MP f/1.8
- Front: 50MP
Samsung Galaxy S25 Ultra
- Main: 200MP f/1.7
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 12MP
Display comparison
Realme 15x
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 144 Hz
Samsung Galaxy S25 Ultra
- 6.9" Dynamic AMOLED 2X
- Resolution: 3120x1440
- Refresh rate: 120 Hz
Battery and charging
Realme 15x
- 7000 mAh
- Wired: 60W
- Wireless charging: no data
Samsung Galaxy S25 Ultra
- 5000 mAh
- NanoReview test: web browsing 11:10 hrs, total 28:43 hrs
- Wired: 45W
- Wireless: 15W
Overall performance score
We compared Realme 15x and Samsung Galaxy S25 Ultra, covering their specs and all relevant benchmarks.
Samsung Galaxy S25 Ultra leads Realme 15x by 83.1% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $1049. Realme 15x was $1049 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Samsung Galaxy S25 Ultra significantly outperforms the Realme 15x (92/100 vs 43/100).
display
In the "display" category, the Samsung Galaxy S25 Ultra notably outperforms the Realme 15x (88/100 vs 65/100).
camera
In the "camera" category, the Samsung Galaxy S25 Ultra significantly outperforms the Realme 15x (81/100 vs 40/100).
battery
In the "battery" category, the Realme 15x notably outperforms the Samsung Galaxy S25 Ultra (75/100 vs 56/100).
portability
In the "portability" category, the Realme 15x and the Samsung Galaxy S25 Ultra are nearly equal (49/100 vs 46/100).
Frequently asked questions
Which is better: the Realme 15x or the Samsung Galaxy S25 Ultra?
The Samsung Galaxy S25 Ultra significantly outperforms the Realme 15x by 29 points (80/100 vs 51/100).
What is the rating of the Realme 15x and the Samsung Galaxy S25 Ultra?
The Realme 15x has a MobileRank rating of 51/100, the Samsung Galaxy S25 Ultra — 80/100.
Which has the better camera: the Realme 15x or the Samsung Galaxy S25 Ultra?
The Samsung Galaxy S25 Ultra leads on camera score (81/100 vs 40/100).
Which is more powerful: the Realme 15x or the Samsung Galaxy S25 Ultra?
The Samsung Galaxy S25 Ultra leads on performance (92/100 vs 43/100).
Should you choose the Realme 15x over the Samsung Galaxy S25 Ultra?
The Realme 15x is a better fit for those who care about battery life. The Samsung Galaxy S25 Ultra is a better fit for gamers and power users, mobile photography enthusiasts.