| Hardware and OS | Xiaomi Mi 5S | Oppo A3s |
| Operating system | MIUI 8 base on Android | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| RAM | 3GB/4GB | |
| GPU | Adreno 530, 624MHz | Adreno 506 |
| Internal Storage | 64GB/128GB | |
| Internal memory | | 16 GB, 2 GB RAM |
| Memory Card Slot | No | |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| User Interface | MIUI | |
| Display | Xiaomi Mi 5S | Oppo A3s |
| Type | LCD | IPS LCD |
| Size | 5.15-inch | 6.2" inc |
| Resolution | 1920x1080 pixels | 720 x 1520 px |
| Touchscreen | Yes, the advanced version support 3D touch | capacitive touchscreen |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Protection | Glass | |
| Pixel Density | 428 PPI | 271 PPI |
| Colors | 600nit, 94%NTSC | 16M |
| Connectivity | Xiaomi Mi 5S | Oppo A3s |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| NFC | yes | |
| 3G Network | | HSDPA 850 / 900 / 2100 |
| 4G Network | | LTE |
| SIM | Nano SIM | |
| Wi-Fi | Yes | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Dual SIM | Yes | |
| Network | | GSM / HSPA / LTE |
| Wireless Charging | No | |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | | 4.2, A2DP, LE |
| Edge | | Yes |
| GPRS | | Yes |
| GPS | Yes | Yes, with A-GPS |
| Speed | | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | USB, type-c | microUSB 2.0, USB On-The-Go |
| Camera | Xiaomi Mi 5S | Oppo A3s |
| Main camera | 12MP, Sony IMX378, f/2.0 | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, AF
-2 MP, f/2.4, depth sensor |
| Features | Yes | LED flash, HDR, panorama |
| Video | 2160p@30fps, 1080p@120fps | 1080p@30fps |
| Selfie camera | 4MP | 8 MP, Single |
| Multimedia | Xiaomi Mi 5S | Oppo A3s |
| Loudspeaker | Yes | |
| Handsfree | Yes | |
| Video Playback | MP4,3GP,3GP2,MKV,AVI,ASF,Xvid,FLV,Ts,Webm | |
| Video Out | H.265(HEVC),H.264,H.263,MPEG-4,MPEG-2,VP9,VP8 | |
| Ring Tones | Yes | |
| 3.5 mm Jack | yes | Yes |
| Radio | No | FM radio |
| Design | Xiaomi Mi 5S | Oppo A3s |
| Waterproof | No | |
| Colors | | Red, Dark Purple |
| Dimensions | 145.6mmx70.3mmx8.25mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 145g | 168 g |
| Battery | Xiaomi Mi 5S | Oppo A3s |
| Placement | Non-removable | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | Xiaomi Mi 5S | Oppo A3s |
| Release date | | 2018, July |
| Sensors | Ultrasonic Fingerprint Sensor | Accelerometer, proximity, compass |
