Xiaomi Redmi K20 Pro vs. Asus ROG Phone II: A Deep Dive into Gaming and Value
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🏆 Quick Verdict
For the average user prioritizing value and a balanced experience, the Xiaomi Redmi K20 Pro emerges as the winner. While the Asus ROG Phone II boasts a slightly faster processor and longer battery endurance, the K20 Pro’s competitive price and capable all-around performance make it a more sensible purchase in today’s market.
| PHONES | ||
|---|---|---|
| Phone Names | Xiaomi Redmi K20 Pro | Asus ROG Phone II ZS660KL |
| Network | ||
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G bands | 1, 3, 5, 7, 8, 34, 38, 39, 40, 41 | 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 28, 29, 32, 34, 38, 39, 40, 41, 46 |
| Speed | HSPA, LTE | HSPA 42.2/5.76 Mbps, LTE (5CA) Cat18 (Cat20 Ultimate edition) 1200/150 Mbps |
| Technology | GSM / HSPA / LTE | GSM / HSPA / LTE |
| Launch | ||
|---|---|---|
| Announced | 2019, May 28. Released 2019, June 01 | 2019, July 22. Released 2019, September |
| Status | Discontinued | Discontinued |
| Body | ||
|---|---|---|
| Build | Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame | Glass front (Gorilla Glass 6), glass back (Gorilla Glass 3), aluminum frame |
| Dimensions | 156.7 x 74.3 x 8.8 mm (6.17 x 2.93 x 0.35 in) | 171 x 77.6 x 9.5 mm (6.73 x 3.06 x 0.37 in) |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM + Nano-SIM |
| Weight | 191 g (6.74 oz) | 240 g (8.47 oz) |
| - | RGB light panel (on the back) | |
| Display | ||
|---|---|---|
| Protection | Corning Gorilla Glass 5 | Corning Gorilla Glass 6 |
| Resolution | 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density) | 1080 x 2340 pixels, 19.5:9 ratio (~391 ppi density) |
| Size | 6.39 inches, 100.2 cm2 (~86.1% screen-to-body ratio) | 6.59 inches, 106.6 cm2 (~80.3% screen-to-body ratio) |
| Type | Super AMOLED, HDR10 | AMOLED, 1B colors, 120Hz, HDR10 |
| Platform | ||
|---|---|---|
| CPU | Octa-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485) | Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485) |
| Chipset | Qualcomm SM8150 Snapdragon 855 (7 nm) | Qualcomm SM8150 Snapdragon 855+ (7 nm) |
| GPU | Adreno 640 | Adreno 640 (700 MHz) |
| OS | Android 9.0 (Pie), upgradable to Android 10, MIUI 12 | Android 9.0 (Pie), ROG UI |
| Memory | ||
|---|---|---|
| Card slot | No | No |
| Internal | 64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM | 128GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM |
| UFS 2.1 | UFS 3.0 | |
| Main Camera | ||
|---|---|---|
| Dual | - | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 13 MP, f/2.4, 11mm (ultrawide) |
| Features | Laser AF, Dual-LED flash, HDR, panorama | Laser AF, LED flash, HDR, panorama |
| Single | - | 5 MP |
| Triple | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.4, 53mm (telephoto), 1/4.0", 1.12µm, PDAF, 2x optical zoom 13 MP, f/2.4, 12mm (ultrawide), 1/3.1", 1.12µm | - |
| Video | 4K@30/60fps, 1080p@30/120/240fps, 1080p@960fps | 4K@30/60fps, 1080p@30/60/240fps, 720p@480fps; gyro-EIS (except @240/480fps) |
| Selfie camera | ||
|---|---|---|
| Features | HDR | Panorama, HDR |
| Single | Motorized pop-up 20 MP, f/2.2, (wide), 1/3.4", 0.8µm | 24MP, f/2.2, 0.9µm |
| Video | 1080p@30fps | 1080p@30fps |
| Sound | ||
|---|---|---|
| 3.5mm jack | Yes | Yes |
| 35mm jack | Yes | Yes |
| Loudspeaker | Yes | Yes, with DTS:X stereo speakers (2 dedicated amplifiers) |
| 24-bit/192kHz audio | 24-bit/192kHz audio | |
| Comms | ||
|---|---|---|
| Bluetooth | 5.0, A2DP, LE, aptX HD | 5.0, A2DP, LE, aptX HD |
| NFC | Yes (China only) | Yes |
| Positioning | GPS (L1+L5), GLONASS (G1), BDS (B1), GALILEO (E1+E5a) | GPS (L1+L5), GLONASS, BDS, GALILEO, QZSS |
| Radio | Yes | FM radio |
| USB | USB Type-C 2.0, OTG | USB Type-C 3.1, accessory connector, OTG |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac/ad, dual-band, Wi-Fi Direct |
| Features | ||
|---|---|---|
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
| Battery | ||
|---|---|---|
| Charging | 27W wired, QC4 | 30W wired 10W reverse wired, QC4 |
| Stand-by | - | Up to 150 h (3G) |
| Talk time | - | Up to 5 h (3G) |
| Type | Li-Po 4000 mAh, non-removable | Li-Po 6000 mAh, non-removable |
| Misc | ||
|---|---|---|
| Colors | Carbon black, Flame red, Glacier blue, Summer Honey, Pearl White | Matte Black, Glossy Black |
| Models | M1903F11I | ASUS_I001D, I001DA, I001DE, I001DC, I001DB, I001D, I001DD |
| Price | About 400 EUR | About 1070 EUR |
| SAR | 1.03 W/kg (head) 0.72 W/kg (body) | - |
| Tests | ||
|---|---|---|
| Audio quality | Noise -93.9dB / Crosstalk -94.2dB | - |
| Battery life | Endurance rating 103h | Endurance rating 114h |
| Camera | Photo / Video | Photo / Video |
| Display | Contrast ratio: Infinite (nominal) | Contrast ratio: Infinite (nominal) |
| Loudspeaker | Voice 71dB / Noise 75dB / Ring 84dB | -19.5 LUFS (Excellent) |
| Performance | AnTuTu: 368846 (v7), 437823 (v8) GeekBench: 10684 (v4.4), 2732 (v5.1) GFXBench: 36fps (ES 3.1 onscreen) | AnTuTu: 398935 (v7), 483239 (v8) GeekBench: 10923 (v4.4) GFXBench: 40fps (ES 3.1 onscreen) |
Xiaomi Redmi K20 Pro
- More affordable price point
- Slightly brighter display (643 nits)
- Balanced all-around performance
- Slightly less powerful processor
- Shorter battery life (103h endurance)
Asus ROG Phone II ZS660KL
- Faster Snapdragon 855+ processor
- Longer battery life (114h endurance)
- Faster 30W charging and 10W reverse charging
- Higher price
- Potentially larger and less pocketable form factor
Display Comparison
Both the Redmi K20 Pro and ROG Phone II feature displays with an infinite (nominal) contrast ratio, typical of AMOLED panels. However, the K20 Pro achieves a slightly higher peak brightness of 643 nits compared to the ROG Phone II’s 626 nits. This difference, while not massive, translates to better visibility under direct sunlight. Both devices lack high refresh rate panels, a common feature in modern gaming phones, limiting their smoothness in fast-paced games. The ROG Phone II’s larger size (not specified in data, but known) provides a more immersive gaming experience, while the K20 Pro’s potentially more compact form factor (again, not specified, but implied) may appeal to users who prefer a more manageable device.
Camera Comparison
Both devices offer a 'Photo / Video' camera experience, but the provided data doesn’t allow for a detailed comparison. Given the ROG Phone II’s gaming focus, it’s likely the K20 Pro prioritizes camera quality. Without sensor size or aperture information, it’s difficult to assess image quality. It’s safe to assume both phones offer competent camera systems for social media and casual photography, but neither is likely to compete with dedicated camera flagships.
Performance
The Asus ROG Phone II holds a slight edge in raw processing power thanks to its Snapdragon 855+ chipset, clocked at 2.96 GHz versus the K20 Pro’s 2.84 GHz Snapdragon 855. While both utilize the same 7nm process, the ‘+’ variant offers a modest performance boost, particularly in sustained workloads. Both phones share the same CPU core configuration (Octa-core: 1x2.84/2.96 GHz Kryo 485, 3x2.42 GHz Kryo 485, 4x1.78 GHz Kryo 485). The ROG Phone II’s superior thermal design (implied by its gaming focus) likely allows it to maintain peak performance for longer periods, minimizing throttling during extended gaming sessions. However, for typical daily tasks, the performance difference will be negligible.
Battery Life
The Asus ROG Phone II boasts a longer endurance rating of 114 hours compared to the Redmi K20 Pro’s 103 hours. This translates to roughly 11 more hours of typical usage. The ROG Phone II also features faster 30W wired charging, compared to the K20 Pro’s 27W QC4 charging. Additionally, the ROG Phone II supports 10W reverse wired charging, a feature absent on the K20 Pro. This means the ROG Phone II can act as a power bank for other devices. While the K20 Pro’s battery life is still respectable, the ROG Phone II’s superior endurance and faster charging are significant advantages for power users and gamers.
Buying Guide
Buy the Xiaomi Redmi K20 Pro if you need a powerful, versatile smartphone that excels in everyday tasks and offers solid gaming performance without breaking the bank. It’s ideal for users who want a flagship experience without the premium price tag. Buy the Asus ROG Phone II ZS660KL if you prioritize dedicated gaming features, extended battery life for marathon sessions, and are willing to pay a premium for a more specialized device. This phone is for the hardcore mobile gamer.