| Name | Asus ROG Phone 3 ZS661KS | Lenovo Legion Duel |
| Brand | Asus | Lenovo |
| Model | ROG Phone 3, ASUS_I003D, ZS661KS | Legion Duel |
| Category | Smartphone | Smartphone |
| Official | 12/512 GB = 100,000/ 16/512 GB = 110,000/ |
| Network Type | GSM / CDMA / HSPA / LTE / 5G | GSM / HSPA / LTE / 5G |
| Network 2G | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| Network 3G | HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
| Network 4G | LTE | LTE |
| Network 5G | SA/NSA | SA/NSA |
| Speed | HSPA, LTE-A, 5G 4.4 Gbps DL | HSPA, LTE-A, 5G |
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| Launch Announcement | 2020, July | 2020, July |
| Launch Date | Available. Released 2020, July | Exp. Release 2020, August |
| Body Dimensions | 171 x 78 x 9.9 mm (6.73 x 3.07 x 0.39 in) | 169.2 x 78.5 x 9.9 mm (6.66 x 3.09 x 0.39 in) |
| Body Weight | 240 g | 239 g |
| Build | Glass Front (Gorilla Glass 6), Glass Back (Gorilla Glass 3), Aluminum Frame | Glass Front, Glass Back, Aluminum Frame |
| Network Sim | Dual SIM (Nano-SIM, Dual stand-by) | Dual SIM (Nano-SIM, Dual stand-by) |
| Display Type | AMOLED capacitive touchscreen, 1B Colors | AMOLED capacitive touchscreen, 16M Colors |
| Display Size | 6.59 inches, 106.6 cm2 (~79.9% screen-to-body ratio) | 6.65 inches, 108.6 cm2 (~81.7% screen-to-body ratio) |
| Display Resolution | 1080 x 2340 pixels, 19.5:9 ratio | 1080 x 2340 pixels, 19.5:9 ratio |
| Display Multitouch | Yes | Yes |
| Display Density | 391 ppi density | 388 ppi density |
| Display Screen Protection | Corning Gorilla Glass 6 |
| Operating System | Android | Android |
| OS Version | 10 (Ten) | 10 (Ten) |
| User Interface (ui) | ROG UI | Legion OS/ ZUI12 |
| CPU | Octa-core (1x3.1 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.8 GHz Kryo 585) | Octa-core (1x3.09 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.8 GHz Kryo 585) |
| GPU | Adreno 650 | Adreno 650 |
| Chipset | Qualcomm SM8250 Snapdragon 865+ (7 nm+) | Qualcomm SM8250 Snapdragon 865+ (7 nm+) |
| Memory Internal | 128 GB, 256 GB, 512 GB | 256 GB, 512 GB |
| Memory External | No | No |
| Ram | 8 GB, 12 GB, 16 GB | 12 GB, 16 GB |
| Primary Camera | Triple: 64 MP | Dual: 64 MP, (wide) |
| 13 MP, (ultrawide) | 16 MP, (ultrawide) | |
| 5 MP, (macro) | ||
| Secondary Camera | 24 MP | Motorized Pop Up 20 MP |
| Camera Features | LED Flash, Panorama, HDR | Dual-LED Dual-tone Flash, Panorama, HDR |
| Video | 8K@30fps, 4K@30/60/120fps, 1080p@30/60/240fps, 720p@480fps | 4K@30fps |
| Audio | Yes | Yes |
| Loudspeaker | Yes with DTS:X Stereo Speakers | Yes, with Stereo Speakers |
| 3.5mm Jack | No | Yes |
| WiFi | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, Hotspot | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, Hotspot |
| Bluetooth | 5.1, A2DP, LE, aptX HD, aptX Adaptive | 5.0, A2DP, LE, aptX HD, aptX Adaptive |
| NFC | Yes | Yes |
| USB | Two (side 3.1, bottom 2.0) Type-C 1.0 reversible connector | Two Type-C 1.0 reversible connectors, USB On-The-Go |
| Fm Radio | No | |
| GPS | Yes, with Dual Band A-GPS | Yes, with A-GPS |
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
| Messaging | Yes | Yes |
| Java | No |
| Battery Type | Non-removable Li-Po Battery | Non-removable Li-Po Battery |
| Battery Capacity | 6000 mAh | 5000 mAh |
| Charging | Fast Charging 30W | Fast Charging 90W, 50% in 10 min, 100% in 30 min (512GB 16GB RAM model) |
| Body Color | Black Glare | Blazing Blue, Vengeance Red |
| Other Features | Power Delivery 3.0, Quick Charge 4.0, 3.0, Reverse charging 10W | Fast Charging 65W, (128GB 12GB RAM, 256GB 12GB RAM models) |