| Hardware and OS | Google Pixel 3a | Oppo A3s |
| Operating system | Android 9.0 (Pie) | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa-core (2x2.0 GHz 360 Gold & 6x1.7 GHz Kryo 360 Silver) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Qualcomm SDM670 Snapdragon 670 (10 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Adreno 615 | Adreno 506 |
| Internal memory | 64 GB, 4 GB RAM | 16 GB, 2 GB RAM |
| External memory | No | microSD, up to 256 GB (dedicated slot) |
| Display | Google Pixel 3a | Oppo A3s |
| Type | OLED | IPS LCD |
| Size | 5.6" inc | 6.2" inc |
| Resolution | 1080 x 2220 px | 720 x 1520 px |
| Protection | Asahi Dragontrail Glass | |
| Touchscreen | capacitive touchscreen | capacitive touchscreen |
| Screen-to-Body Ratio | 75.0% | 81.2% |
| Display area | 79.6 cm2 | 95.9 cm2 |
| Display aspect ratio | 18.5:9 (height:width) | 19:9 (height:width) |
| Pixel Density | 441 PPI | 271 PPI |
| Colors | Type OLED | 16M |
| Other | Always-on display | |
| Connectivity | Google Pixel 3a | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 20(800), 25(1900), 26(850), 28(700), 32(1500), 38(2600), 40(2300), 41(2500), 66(1700/2100) | LTE |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | GSM / CDMA / HSPA / EVDO / LTE | GSM / HSPA / LTE |
| SIM card | Nano-SIM | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | 5.0, A2DP, LE, aptX HD | 4.2, A2DP, LE |
| Edge | Yes | Yes |
| GPRS | Yes | Yes |
| GPS | Yes, with A-GPS, GLONASS, GALILEO | Yes, with A-GPS |
| NFC | Yes | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (3CA) Cat11 600/75 Mbps | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | 2.0, Type-C 1.0 reversible connector | microUSB 2.0, USB On-The-Go |
| Camera | Google Pixel 3a | Oppo A3s |
| Main camera | 12.2 MP, Single | 13 MP, Dual |
| Specs | 12.2 MP, f/1.8, 28mm (wide), 1/2.55', 1.4µm, OIS, dual pixel PDAF | 13 MP, f/2.2, AF
-2 MP, f/2.4, depth sensor |
| Features | Dual-LED flash, HDR, panorama | LED flash, HDR, panorama |
| Video | 2160p@30fps, 1080p@30/60/120fps | 1080p@30fps |
| Selfie camera | 8 MP, Single | 8 MP, Single |
| Multimedia | Google Pixel 3a | Oppo A3s |
| Radio | | FM radio |
| 3.5 mm Jack | Yes | Yes |
| Design | Google Pixel 3a | Oppo A3s |
| Colors | Just Black, Clearly White, Purple-ish | Red, Dark Purple |
| Body build | Front glass, plastic body | |
| Dimensions | 151.3 x 70.1 x 8.2 mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 147 g | 168 g |
| Battery | Google Pixel 3a | Oppo A3s |
| Battery capacity | 3000 mAh, Non-removable Li-Po | 4230 mAh, Non-removable Li-Ion |
| Other | Google Pixel 3a | Oppo A3s |
| Release date | 2019, May | 2018, July |
| Sensors | Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, barometer | Accelerometer, proximity, compass |
