| Vivo Y91 | Motorola One Vision | |
| Specifications | ||
| Brand | Vivo | Motorola | 
| Model | - | - | 
| Release Date | November 2018 | June 2019 | 
| Operating System | Android 8.1 | Android 9.0 | 
| Dimensions | ||
| Size | 155.1 x 75.1 x 8.3 mm 6.11 x 2.96 x 0.33 in | 160.1 x 71.2 x 8.7 mm 6.30 x 2.80 x 0.34 in | 
| Weight | 164 g 5.77 oz | 180 g 6.35 oz | 
| Screen | ||
| Size | 6.22 inches | 6.3 inches | 
| Resolution | 720 x 1,520 pixels | 1,080 x 2,520 pixels | 
| PPI | 270 | 432 | 
| Features | - | - | 
| Cameras | ||
| Rear | Dual camera 13 MP f/2.2 2 MP f/2.4 Depth | Dual camera 48 MP f/1.7 Wide 5 MP f/2.2 Depth | 
| Front | 8 MP f/1.8 | 25 MP f/2.0 | 
| Storage | ||
| Memory | 2 GB 3 GB | 4 GB | 
| Fixed | 16 GB 32 GB | 128 GB | 
| Removable | microSDXC | microSDXC | 
| Processor | ||
| Chip | Qualcomm Snapdragon 439 SDM439 Octa-core processor 12 nm | Samsung Exynos 9609 Octa-core processor 10 nm | 
| CPU | 4x 1.95 GHz Cortex-A53 4x 1.45 GHz Cortex-A53 | 4x 2.20 GHz Cortex-A73 4x 1.60 GHz Cortex-A53 | 
| GPU | Adreno 505 | Mali-G72 MP3 | 
| Battery | ||
| Capacity | 4,030 mAh | 3,500 mAh | 
| Features | - | Fast charging 15W | 
| Removable | ||
| Connectivity | ||
| 5G | ||
| NFC | ||
| 3.5 mm Audio Jack | ||
| Micro USB | ||
| USB Type-C | ||
| Lightning | ||