Both Realme Narzo 20 (4GB RAM + 128GB) and Xiaomi Redmi 9 (4GB RAM + 128GB) comes with same RAM. Both have the same amount of internal memory.
| Name | Realme Narzo 20 (4GB RAM + 128GB) | Xiaomi Redmi 9 (4GB RAM + 128GB) | 
| RAM | 4 GB | 4 GB | 
|---|---|---|
| Display | 6.5 in | 6.53 in | 
| Internal Memory | 128 GB | 128 GB | 
| Battery | 6000 mAh | 5000 mAh | 
| Camera | 48 MP + 8 MP + 2 MP Triple | 13 MP + 2 MP Dual | 
| Price | Rs. 8490 | Rs. 9890 | 
The launch Date of the first phone is September 21, 2020. The cost of Realme Narzo 20 (4GB RAM + 128GB) is Rs. 8490. The launch Date of the second phone is August 27, 2020 . The cost of Xiaomi Redmi 9 (4GB RAM + 128GB) is Rs. 9890.
Xiaomi Redmi 9 (4GB RAM + 128GB) has larger screen size of 6.53 inches in comparison to Realme Narzo 20 (4GB RAM + 128GB)'s 6.5 inch screen. Realme Narzo 20 (4GB RAM + 128GB) has IPS LCD Screen type where as Xiaomi Redmi 9 (4GB RAM + 128GB) has LCD Screen type. Realme's phone has display density of 270 PPI & Xiaomi's phone has only 269 PPI display density. In terms of screen to body ratio, Realme's phone has better screen to body ratio of ~ 88.7% than Xiaomi's phone ~ 81%. Realme Narzo 20 (4GB RAM + 128GB) has 20:9 aspect ratio where as Xiaomi Redmi 9 (4GB RAM + 128GB) has 20:9 aspect ratio.
Both mobiles come with 4 GB RAM and both have same Internal Memory of 128 GB.
Realme Narzo 20 (4GB RAM + 128GB)'s 48 MP + 8 MP + 2 MP Triple Rear Camera outclasses Xiaomi Redmi 9 (4GB RAM + 128GB)'s 13 MP + 2 MP Dual Rear Camera in terms of resolution. Realme Narzo 20 (4GB RAM + 128GB) will be better choice if you're looking to click lot of selfies as it has better 8 MP Front Camera in comparison to Xiaomi Redmi 9 (4GB RAM + 128GB)'s 5 MP Front Camera.
Both the phones has Android Operating System but the first one runs on version v10 (Q) and the second one on 10 version.
| Name | Realme Narzo 20 (4GB RAM + 128GB) | Xiaomi Redmi 9 (4GB RAM + 128GB) | 
| General | ||
| Model | Narzo 20 | Redmi 9 | 
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM | 
| Dual Sim | Yes | Yes | 
| Sim Size | Nano+Nano SIM | Nano+Nano SIM | 
| Device Type | Smartphone | Smartphone | 
| Release Date | September 21, 2020 | August 27, 2020 | 
| Design | ||
| Dimensions | 75.9 x 164.5 x 9.8 mm | 77.07 x 164.9 x 9 mm | 
| Weight | 208 g | 196 g | 
| Display | ||
| Type | Color IPS LCD Screen (16.7M) | Color LCD Screen (16M Colors) | 
| Touch | Yes | Yes | 
| Size | 6.5 inches, 720 x 1600 pixels, 60 Hz | 6.53 inches, 720 x 1600 pixels | 
| Aspect Ratio | 20:9 | 20:9 | 
| PPI | ~ 270 PPI | ~ 269 PPI | 
| Screen to Body Ratio | ~ 88.7% | ~ 81% | 
| Glass Type | 2.5D Glass with Gorilla Glass 3 | |
| Notch | Yes, Water Drop Notch | Yes, Water Drop Notch | 
| Memory | ||
| RAM | 4 GB | 4 GB | 
| Storage | 128 GB | 128 GB | 
| Card Slot | Yes, upto 256 GB | Yes, upto 512 GB | 
| Connectivity | ||
| GPRS | Yes | Yes | 
| EDGE | Yes | Yes | 
| 3G | Yes | Yes | 
| 4G | Yes | Yes | 
| VoLTE | Yes, Dual Stand-By | Yes, Dual Stand-By | 
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot | 
| Bluetooth | Yes, v5.0, A2DP, LE | Yes, v5.0, A2DP, LE | 
| USB | Yes, USB-C v2.0 | Yes, microUSB v2.0 | 
| USB Features | USB on-the-go, USB Charging | USB on-the-go, USB Charging | 
| IR Blaster | No | |
| Extra | ||
| GPS | yes with A-GPS, Beidou, Glonass | Yes, with A-GPS, GLONASS, BDS | 
| Fingerprint Sensor | Yes, Rear | Yes, Rear | 
| Face Unlock | Yes | Yes | 
| Sensors | Light sensor, Proximity sensor, Accelerometer, Gyroscope | Vibration Motor, Distance Sensor, Ambient Light Sensor, Aaccelerometer, Compass | 
| 3.5mm Headphone Jack | Yes | Yes | 
| Splash Resistant | Yes, Protected by P2i | |
| Camera | ||
| Rear Camera | 48 MP ƒ/1.8 (Wide Angle) 8 MP ƒ/2.3 (Ultra Wide) 2 MP ƒ/2.4 (Macro) Macro | 13 MP ƒ/2.2 (Wide Angle) 2 MP ƒ/2.4 (Depth Sensor) | 
| Auto Focus | Yes | Yes | 
| Features | Digital Zoom, Auto Flash, Face detection, Touch to focus | HDR, AI Portrait Mode, Face Recognition, AI Beautify 5.0, AI Scene Detection | 
| Video Recording | 1080p @ 30 fps FHD | 1080p @ 30 fps FHD | 
| Flash | Yes, LED | Yes, LED | 
| Front Camera | 8 MP ƒ/2 (Main) | 5 MP ƒ/2.2 | 
| Front Video Recording | 1080p @ 30 fps FHD | 1080p @ 30 fps FHD | 
| Technical | ||
| OS | Android v10, upgradable to v11 | Android v10 | 
| Chipset | MediaTek Helio G85 | MediaTek Helio G35 | 
| CPU | 2 GHz, Octa Core Processor | 2.3 GHz, Octa Core Processor | 
| Core Details | 2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55 | Arm Cortex-A53 | 
| GPU | Mali-G52 | IMG PowerVR GE8320 | 
| Java | No | No | 
| Browser | Yes, supports HTML5 | Yes, supports HTML5 | 
| Multimedia | ||
| Yes | Yes | |
| Music | AAC, APE, FLAC, AMR, MID, MP3, OGG, WAV, MKA | Yes | 
| Video | MP4, 3GP, ASF, AVI, FLV, MKV, MPG, WEBM, WMV | Yes | 
| FM Radio | Yes | Yes | 
| Document Reader | Yes | Yes | 
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery | 
| Size | 6000 mAh, Li-ion Battery | 5000 mAh, Li-Po Battery | 
| Fast Charging | Yes, 18W Fast Charging | |
| Reverse Charging | Yes | |
| Talk Time | 37 hours | |
| Music Playback Time | 164 hours | |