Both Xiaomi Redmi Note 9 and Realme C25 (4GB RAM + 128GB) comes with same RAM. In terms of display resolution, Xiaomi Redmi Note 9 has better resolution of 2340 x 1080 than Realme C25 (4GB RAM + 128GB) which has resolution of 720 x 1600. Realme C25 (4GB RAM + 128GB) has more internal memory than Xiaomi Redmi Note.
| Name | Xiaomi Redmi Note 9 | Realme C25 (4GB RAM + 128GB) | 
| RAM | 4 GB | 4 GB | 
|---|---|---|
| Display | 6.53 in | 6.5 in | 
| Internal Memory | 64 GB | 128 GB | 
| Battery | 5020 mAh | 6000 mAh | 
| Camera | 48 MP Quad | 13 MP + 2 MP + 2 MP Triple | 
| Price | Rs. 9896 | Rs. 7950 | 
The launch Date of the first phone is July 20, 2020 . The cost of Xiaomi Redmi Note 9 is Rs. 9896. The launch Date of the second phone is April 8, 2021. The cost of Realme C25 (4GB RAM + 128GB) is Rs. 7950.
Xiaomi Redmi Note 9 has larger screen size of 6.53 inches in comparison to Realme C25 (4GB RAM + 128GB)'s 6.5 inch screen. Xiaomi Redmi Note 9 has IPS LCD Screen type where as Realme C25 (4GB RAM + 128GB) has LCD Screen type. Xiaomi's phone has display density of 403 PPI & Realme'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 ~ 83.5%. Xiaomi Redmi Note 9 has 19.5:9 aspect ratio where as Realme C25 (4GB RAM + 128GB) has 20:09 aspect ratio.
Both phones come with 4 GB RAM Realme C25 (4GB RAM + 128GB) has more Internal Memory (128 GB) than Xiaomi Redmi Note 9 (64 GB).
Xiaomi Redmi Note 9's 48 MP Quad Rear Camera outshines Realme C25 (4GB RAM + 128GB)'s 13 MP + 2 MP + 2 MP Triple Rear Camera in terms of resolution. Xiaomi Redmi Note 9 will be better choice if you're looking to click lot of selfies as it has better 13 MP Front Camera in comparison to Realme C25 (4GB RAM + 128GB)'s 8 MP Front Camera.
Both the phones has Android Operating System but the first one runs on version 10.0 and the second one on 11 version.
| Name | Xiaomi Redmi Note 9 | Realme C25 (4GB RAM + 128GB) | 
| General | ||
| Model | Redmi Note 9 | RMX3193, C25 | 
| 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 | July 20, 2020 | April 8, 2021 | 
| Design | ||
| Dimensions | 77.2 x 162.3 x 8.9 mm | 75.9 x 164.5 x 9.6 mm | 
| Weight | 199 g | 209 g | 
| Display | ||
| Type | Color IPS LCD Screen (16M Colors) | Color LCD Screen (16.7M) | 
| Touch | Yes | Yes | 
| Size | 6.53 inches, 1080 x 2340 pixels | 6.5 inches, 1600 x 720 pixels, 60 Hz | 
| Aspect Ratio | 19.5:9 | 20:09 | 
| PPI | ~ 403 PPI | ~ 269 PPI | 
| Screen to Body Ratio | ~ 83.5% | ~ 88.7% | 
| Glass Type | Corning Gorilla Glass 5 | |
| Features | Reading Mode 2.0, Plastic Frame | Sunlight Screen Support, COG Sealing Process, WideVine L3 | 
| Notch | Yes, Punch Hole | Yes, Water Drop Notch | 
| Memory | ||
| RAM | 4 GB | 4 GB | 
| Storage | 64 GB | 128 GB | 
| Card Slot | Yes, upto 512 GB | Yes, upto 256 GB | 
| Connectivity | ||
| GPRS | Yes | Yes | 
| EDGE | Yes | Yes | 
| 3G | Yes | Yes | 
| 4G | Yes | Yes | 
| VoLTE | Yes, Dual Stand-By | Yes | 
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot | 
| Bluetooth | Yes, v5.0, A2DP, LE | Yes, v5.0 | 
| USB | Yes, USB-C | Yes, USB-C | 
| USB Features | USB Tethering, USB on-the-go, USB Charging | USB on-the-go, USB Charging | 
| IR Blaster | Yes | |
| Extra | ||
| GPS | yes with A-GPS, GLONASS, GALILEO, BDS | Yes | 
| Fingerprint Sensor | Yes, Rear | Yes, Rear | 
| Face Unlock | Yes | Yes | 
| Sensors | Light sensor, Proximity sensor, Accelerometer, Compass | Magnetic Induction Sensor, Light Sensor, Proximity Sensor, Acceleration Sensor | 
| 3.5mm Headphone Jack | Yes | Yes | 
| Splash Resistant | Yes | |
| Extra Features | Heat Dissipation Technology: Dual Layer Graphite + Copper Foil, Night Shield, Game Space, APP Market, Theme Store, Clone Phone, Phone Manager, Google Lens | |
| Camera | ||
| Rear Camera | 48 MP ƒ/1.79 (Main) 8 MP ƒ/2.2 (Ultra Wide) 2 MP ƒ/2.4 (Macro) Macro 2 MP ƒ/2.4 (Depth Sensor) | 13 MP ƒ/2.2 (Main) 2 MP ƒ/2.4 Portrait 2 MP ƒ/2.4 (Macro) Macro | 
| Camera Sensor | CMOS Sensor | |
| Auto Focus | Yes | Yes | 
| Features | Night Mode, Document Mode, Cinematic portraits, HDR, Panorama, Pro mode, Portrait | Supports 20 Continuous Shooting, Photograph Functions: Beauty, Filter, HDR, Panoramic View, Portrait, Timelapse, Slo-mo, NightScape, Expert, Slow-mo Video Recording | 
| Video Recording | 1080p @ 30 fps FHD, 720p @ 120/30 fps HD | 720p, 720P | 
| Flash | Yes, LED | Yes, LED | 
| Front Camera | 13 MP ƒ/2.3 (Main) | 8 MP ƒ/2 Screen Flash | 
| Front Video Recording | 1080p @ 30 fps FHD | |
| Technical | ||
| OS | Android v10.0 | Android v11 | 
| Chipset | MediaTek Helio G85 | Mediatek Helio G70 | 
| CPU | 2 GHz, Octa Core Processor | 2 GHz, Octa Core Processor | 
| Core Details | 2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55 | 2x2.0 GHz Cortex-A75 & 6x1.7 GHz Cortex-A55 | 
| GPU | Mali-G52 MC2 | ARM G52 MC2 | 
| Java | No | No | 
| Browser | Yes, supports HTML5 | Yes | 
| Multimedia | ||
| Yes | Yes | |
| Music | MP3, AMR, FLAC, APE | AAC, APE, FLAC, AMR, MID, MP3, OGG, WAV, WMA, MKA | 
| Video | MP4, M4V, MKV, XVID | MP4, 3GP, ASF, AVI, FLV, M2TS, MKV, MPG, TS, WEBM, WMV | 
| FM Radio | Yes | No | 
| Document Reader | Yes | |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery | 
| Size | 5020 mAh, Li-ion Battery | 6000 mAh, Li-Po Battery | 
| Fast Charging | Yes, 22.5W Fast Charging | Yes, 18W Fast Charging | 
| Reverse Charging | Yes, 9W Reverse Charging | |
| Talk Time | 34 hours | |
| Music Playback Time | 171 hours | |