| Vivo Y91 | Xiaomi Redmi 7A | |
| Specifications | ||
| Brand | Vivo | Xiaomi |
| Model | - | - |
| Release Date | November 2018 | July 2019 |
| Operating System | Android 8.1 | MIUI (Android 9.0) |
| Dimensions | ||
| Size | 155.1 x 75.1 x 8.3 mm 6.11 x 2.96 x 0.33 in |
146.3 x 70.4 x 9.6 mm 5.76 x 2.77 x 0.38 in |
| Weight | 164 g 5.77 oz |
165 g 5.82 oz |
| Screen | ||
| Size | 6.22 inches | 5.45 inches |
| Resolution | 720 x 1,520 pixels | 720 x 1,440 pixels |
| PPI | 270 | 295 |
| Features | - | - |
| Cameras | ||
| Rear | Dual camera 13 MP f/2.2 2 MP f/2.4 Depth |
12 MP f/2.2 |
| Front | 8 MP f/1.8 | 5 MP f/2.2 |
| Storage | ||
| Memory | 2 GB 3 GB |
2 GB 3 GB |
| Fixed | 16 GB 32 GB |
16 GB 32 GB |
| Removable | microSDXC | microSDXC |
| Processor | ||
| Chip | Qualcomm Snapdragon 439 SDM439 Octa-core processor 12 nm |
Qualcomm Snapdragon 439 SDM439 Octa-core processor 12 nm |
| CPU | 4x 1.95 GHz Cortex-A53 4x 1.45 GHz Cortex-A53 |
4x 1.95 GHz Cortex-A53 4x 1.45 GHz Cortex-A53 |
| GPU | Adreno 505 | Adreno 505 |
| Battery | ||
| Capacity | 4,030 mAh | 4,000 mAh |
| Features | - | - |
| Removable | ||
| Connectivity | ||
| 5G | ||
| NFC | ||
| 3.5 mm Audio Jack | ||
| Micro USB | ||
| USB Type-C | ||
| Lightning | ||