| Hardware and OS | Realme C51 | vivo Y11 |
| Operating system | Android v12 | Android 4.4.4 (KitKat) |
| Processor | Octa core (2.3 GHz, Quad core, Cortex A53 1.8 GHz, Quad core, Cortex A53) | Quad-core 1.3 GHz Cortex-A7 |
| Custom UI | Realme UI | |
| Chipset | MediaTek Helio P35 | Mediatek MT6582М |
| GPU | PowerVR GE8320 | Mali-400MP2 |
| Internal memory | 32 GB | 4 GB, 512 MB RAM |
| Architecture | 64 bit | |
| External memory | Yes, Up to 256 GB | microSD, up to 256 GB (dedicated slot) |
| RAM | 3 GB | |
| Display | Realme C51 | vivo Y11 |
| Type | IPS LCD | IPS LCD |
| Size | 6.5 inches (16.51 cm) | 4" inc |
| Resolution | | 480 x 800 px |
| Touchscreen | Yes, Capacitive Touchscreen, Multi-touch | capacitive touchscreen |
| Screen-to-Body Ratio | | 59.2% |
| Display area | | 45.5 cm2 |
| Screen format | 20:9 | |
| Display aspect ratio | | 5:3 (height:width) |
| PPI /points per inch/ | 270 ppi | |
| Pixel Density | | 233 PPI |
| Colors | | 16M |
| Connectivity | Realme C51 | vivo Y11 |
| 4G Bands | TD-LTE 2300(band 40), FD-LTE 1800(band 3) | |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| Network Support | 4G, 3G, 2G | |
| Wi-Fi | Yes, Wi-Fi 802.11, b/g/n | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| Network | | GSM / HSPA |
| SIM Slot(s) | Dual SIM, GSM GSM | |
| SIM card | SIM1: Nano, SIM2: Nano | Dual SIM (Micro-SIM, dual stand-by) |
| Bluetooth | Yes, v5.0 | 4.0, A2DP, EDR |
| Edge | | Yes |
| USB Connectivity | Mass storage device, USB charging | |
| GPRS | | Yes |
| VoLTE | Yes | |
| GPS | Yes with A-GPS | Yes, with A-GPS |
| Speed | | HSPA 21.1/7.2 Mbps |
| USB | | microUSB 2.0, USB Host |
| Camera | Realme C51 | vivo Y11 |
| Camera Setup | Triple | |
| Main camera | 13 MP, Primary Camera, 2 MP, Macro Camera, 2 MP, Depth Camera, | 5 MP, Single |
| Autofocus | Yes | |
| Specs | | 5 MP, AF |
| Camera Features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Features | | LED flash |
| Flash | Yes, LED Flash | |
| Video | | 1080p@30fps |
| Image Resolution | 4128 x 3096 Pixels | |
| Selfie camera | 8 MP, Primary Camera, | 2 MP, Single |
| Multimedia | Realme C51 | vivo Y11 |
| 3.5 mm Jack | | Yes |
| Headphone jack | 3.5 mm | |
| Radio | | FM radio |
| Loudspeaker | Yes | |
| Design | Realme C51 | vivo Y11 |
| Colors | | White, Black |
| Dimensions | | 123 x 62.5 x 8.8 mm |
| Weight | | 124 g |
| Battery | Realme C51 | vivo Y11 |
| Capacity | 6000 mAh | |
| Type | Li-Polymer | |
| Removable | No | |
| USB Type-C | Yes | |
| Battery capacity | | 1700 mAh, Removable Li-Po |
| Battery life | | Talking time- Up to 11 h (2G) / Up to 8 h (3G)
Music play - Up to 34 h |
| Other features | Realme C51 | vivo Y11 |
| Fingerprint Sensor | Yes | |
| Fingerprint Sensor Position | Rear | |
| Other Sensors | Light sensor, Proximity sensor, Accelerometer | |
| Other | Realme C51 | vivo Y11 |
| Release date | | 2014, Q4 |
| Sensors | | Accelerometer, proximity , Infrared port |
