| Hardware and OS | Oppo A9s | vivo Y11 |
| Operating system | Android v9.0 (Pie) | Android 4.4.4 (KitKat) |
| Processor | 1.8 GHz, Octa Core Processor | Quad-core 1.3 GHz Cortex-A7 |
| Chipset | Qualcomm Snapdragon 665 | Mediatek MT6582М |
| GPU | | Mali-400MP2 |
| RAM | 4 GB | |
| Internal memory | 128 GB | 4 GB, 512 MB RAM |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Memory Card Slot | No | |
| Graphics | Adreno 610 | |
| Dual Sim | Yes | |
| Sim Size | Nano Nano SIM | |
| Sim Type | Dual Sim, GSM GSM | |
| Display | Oppo A9s | vivo Y11 |
| Type | | IPS LCD |
| Size | | 4" inc |
| Resolution | | 480 x 800 px |
| Touchscreen | | capacitive touchscreen |
| Screen-to-Body Ratio | ~ 85.3% | 59.2% |
| Screen Size | 6.5 inches, 720 x 1600 pixels | |
| Display area | | 45.5 cm2 |
| Display Type | Color LTPS IPS LCD (16M) | |
| Display aspect ratio | 19.5:9 | 5:3 (height:width) |
| Pixel Density | ~396 PPI | 233 PPI |
| Colors | | 16M |
| Touch Screen | Yes, with Multitouch | |
| Connectivity | Oppo A9s | vivo Y11 |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| Wi-Fi | | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| 3G Network | Yes | |
| Network | | GSM / HSPA |
| 4G Network | Yes | |
| SIM card | | Dual SIM (Micro-SIM, dual stand-by) |
| Bluetooth | Yes, v5.0 | 4.0, A2DP, EDR |
| Edge | Yes | Yes |
| GPRS | Yes | Yes |
| GPS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS |
| Speed | | HSPA 21.1/7.2 Mbps |
| USB Features | USB on-the-go | |
| USB | Yes, microUSB v2.0 | microUSB 2.0, USB Host |
| VoLTE | Yes | |
| Wifi | Yes, with wifi-hotspot | |
| Camera | Oppo A9s | vivo Y11 |
| Main camera | 16 MP (Main)
2 MP f/2.4 (Depth Sensor) with autofocus | 5 MP, Single |
| Specs | | 5 MP, AF |
| Features | HDR, Panorama | LED flash |
| Video Recording | 1080p @ 30fps FHD | |
| Video | | 1080p@30fps |
| Flash | Yes, LED | |
| Selfie camera | 16 MP | 2 MP, Single |
| Multimedia | Oppo A9s | vivo Y11 |
| 3.5 mm Jack | | Yes |
| Headphone jack | Yes | |
| Radio | | FM radio |
| Email | Yes | |
| FM Radio | No | |
| Music | Yes | |
| Video | Yes | |
| Browser | Yes, supports HTML5 | |
| Java | No | |
| Design | Oppo A9s | vivo Y11 |
| Colors | | White, Black |
| Dimensions | 162 x 76.1 x 8.3 mm | 123 x 62.5 x 8.8 mm |
| Weight | 190 g | 124 g |
| Battery | Oppo A9s | vivo Y11 |
| Battery capacity | 5000 mAh, Li-Po Battery | 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 |
| Type | Non-Removable Battery | |
| Other | Oppo A9s | vivo Y11 |
| Release date | | 2014, Q4 |
| Sensors | | Accelerometer, proximity , Infrared port |
