Asus Rog Phone 9 ProvsSamsung Galaxy S21 Ultra
We compare these two popular phones to help you decide which one fits your needs and budget better.
Asus Rog Phone 9 Pro
#55
+3
Processor:Qualcomm Snapdragon 8 Elite
RAM:16 GBGB
Storage:512 GBGB
Quick Stats
The ROG Phone 9 Pro's 5800 mAh battery with 65W fast charging and 12Hz power-saving mode ensures all-day gaming endurance without frequent recharging.
The ROG Phone 9 Pro's 165Hz display with 720Hz touch sampling, 2500-nit brightness, and 3D curved glass delivers ultra-responsive, vivid, and immersive gaming visuals.
The ROG Phone 9 Pro's triple rear cameras, 8K video, and optical zoom deliver professional-grade photography and dynamic gaming content.
Flagship Snapdragon 8 Elite and Adreno 830 GPU with 50% larger cooling system deliver 3,073,451 Antutu performance and lag-free multitasking for intensive gaming and apps.
Samsung Galaxy S21 Ultra
#53
Winner
+19
Processor:Samsung Exynos 2100
RAM:12 GBGB
Storage:128 GBGB
Quick Stats
The S21 Ultra's 5000mAh battery with 25W fast charging and adaptive display ensures all-day endurance.
The S21 Ultra's 120Hz adaptive display with HDR10+ and 1500 nits brightness delivers immersive, vibrant visuals.
The S21 Ultra’s 108MP main lens, 3x/10x optical zoom, and 8K video deliver pro-level photo and video capabilities.
The S21 Ultra's Exynos 2100 processor and 12GB RAM ensure smooth multitasking and lag-free performance for demanding apps and gaming.
Specifications Comparison
Specification
Asus Asus Rog Phone 9 Pro
Samsung Samsung Galaxy S21 Ultra
Model
Qualcomm Snapdragon 8 Elite
Samsung Exynos 2100
CPU
2x4.32 GHz Oryon V2 Phoenix L+ 6x3.53 GHz Oryon V2 Phoenix M
1x Cortex, X1 2,91 GHz + 3x Cortex, A78 2,81 GHz + 4x Cortex, A55 2,21 GHz.
Type
Octa-Core
Octa-Core
Nanometer
3 nm
5 nm
Frequency
4,3 GHz
2,9 GHz
64 Bits
Yes
Yes
GPU
Adreno 830
ARM Mali-G78 MP14
RAM
16 GB
12 GB
Type
RAM LPDDR5X
RAM LPDDR5
Capacity
512 GB
128 GB
Type
UFS Storage 4.0
UFS Storage 3.1
SD slot
No
No
Fingerprint security
Yes, in screen
Yes, in screen
Fingerprint sensor
Yes
Yes
Proximity sensor
Yes
Yes
Light sensor
Yes
Yes
Accelerometer sensor
Yes
Yes
Compass sensor
Yes
Yes
Gyroscope sensor
Yes
Yes
Barometer sensor
N/A
Yes
Gravity sensor
Yes
N/A
Hall sensor
N/A
Yes
Geomagnetic sensor
N/A
Yes
Audio
DTS / DTS X, Stereo Speakers, 3 microphones
Dolby Atmos, Hi-Res Audio, Noise cancellation microphone, Stereo Speakers
Antutu Score
3073451
749000
Antutu Version
Antutu v10
Antutu v10
Antutu Standing
Overall performance better than 99% of devices
Overall performance better than 80% of devices
Cooling system
Yes
No
Gaming buttons
Yes
No
Extras
N/A
N/A
Note: Highlighted specifications show differences between the two devices.
Rankings
Connectivity
Asus Rog Phone 9 Pro
#480
Samsung Galaxy S21 Ultra
#221
Winner
Design
Asus Rog Phone 9 Pro
#131
Samsung Galaxy S21 Ultra
#100
Winner
Display
Asus Rog Phone 9 Pro
#628
Samsung Galaxy S21 Ultra
#4
Winner
Performance
Asus Rog Phone 9 Pro
#12
Winner
Samsung Galaxy S21 Ultra
#422
Battery
Asus Rog Phone 9 Pro
#168
Winner
Samsung Galaxy S21 Ultra
#622
Camera
Asus Rog Phone 9 Pro
#182
Samsung Galaxy S21 Ultra
#9
Winner
| Metric | Asus Rog Phone 9 Pro | Samsung Galaxy S21 Ultra |
|---|---|---|
| Connectivity | #480 | #221 Winner |
| Design | #131 | #100 Winner |
| Display | #628 | #4 Winner |
| Performance | #12 Winner | #422 |
| Battery | #168 Winner | #622 |
| Camera | #182 | #9 Winner |
Note: Lower rank number indicates a better position in category.
Key Differences
No significant specification differences found between these devices.
Scores by Category
Pros and Cons
Asus Rog Phone 9 Pro
Strengths
Premium build quality with IP68 water/dust resistance and durable materials
Exceptional display with 165Hz refresh rate, 720Hz touch sampling, and 2500-nit peak brightness
Advanced cooling system (50% larger) for sustained high-performance gaming
Long-lasting 5800mAh battery with 65W fast charging and power-saving modes
Weaknesses
Heavier than typical smartphones (227g) due to robust build and battery
Premium price tag of $1,300 limits accessibility for budget-conscious buyers
Front-facing camera specifications not clearly detailed in official data
Telephoto lens resolution and specific zoom capabilities remain unspecified
Lacks a front-facing speaker, requiring external speakers for hands-free use
3.5mm audio jack included but increasingly rare in modern flagship devices
Samsung Galaxy S21 Ultra
Strengths
Exceptional 120Hz adaptive display with HDR10+ and 1500 nits brightness for vibrant visuals.
Advanced quad-camera system with 108MP main lens, 3x/10x optical zoom, and 8K video recording.
Premium build with IP68 water resistance, Gorilla Glass Victus, and a sleek frameless design.
Powerful Exynos 2100 processor and Mali-G78 GPU for smooth multitasking and gaming.
Weaknesses
No expandable storage via SD card slot.
No bundled charger (25W fast charging requires purchase separately).
High price for a flagship device with non-removable battery.
Non-removable battery limits upgrade or replacement options.
Lacks periscope-style ultra-zoom compared to later flagships.
Read Full Reviews
Asus Rog Phone 9 Pro
Unleash next-level gaming power with the Asus ROG Phone 9 Pro: advanced cooling, fluid display, and immersive features for all-day performance and style.
Samsung Galaxy S21 Ultra
Experience the pinnacle of innovation with the Samsung Galaxy S21 Ultra. Its sleek, premium design merges a vibrant adaptive display with a powerful camera system, delivering breathtaking visuals and pro-level photography in a durable, edge-to-edge masterpiece.
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