On Design both phones have plastic build, Zenfone Max Pro M2 Plastic back looks like Glass. On Display Galaxy M20 has a 6.3-inch (2340 x 1080 pixels) Full HD+ TFT 19.5:9 TFT Infinity V display whereas Max Pro M2 has a 6.26-inch (2280 × 1080 pixels) Full HD+ 19:9 display with Corning Gorilla Glass 6 protection
Galaxy M20 is powered by  Octa-Core Exynos 7904 14nm processor with 3/4GB RAM compared to Octa Core Snapdragon 660 14nm Processor with 3/4/6GB RAM both phones have 32/64GB Storage and support for dedicated MicroSD card. Performance is better on Zenfone Max Pro M2.
On Camera, Galaxy M20 comes with a 13MP rear camera with LED flash, f/1.9 aperture, 5MP ultra-wide angle camera with f/2.2 aperture and  8MP front-facing camera. It can record 1080p videos, No EIS support. Zenfone Max Pro M2 has a 12MP rear camera with LED flash, Sony IMX486 sensor, f/1.8 aperture, 1.25μm pixel size, secondary 5MP camera and 13MP front camera with f/2.0 aperture, LED flash, Support for 4K Videos and EIS Support. Galaxy M20 runs on Android 8.1 Oreo with Samsung Experience 9.5 whereas Zenfone Max Pro M2 runs on Stock Android.Both Phones have support for Dual 4G VoLTE, Lacks 5GHz Brand. Both phones are powered by 5000mAh Battery, Galaxy M20 has support for Fast charging has support for USB Type C which lacks in Zenfone Max Pro M2.
Samsung Galaxy M20 vs Asus Zenfone Max Pro M2
| Display:6.3-inch (2340 x 1080 pixels) Full HD+ 19.5:9 TFT display |  6.26-inch (2280 × 1080 pixels) Full HD+ 19:9 display with Corning Gorilla Glass 6 protection |
| CPU: Octa-Core Exynos 7904 14nm processor |  Octa Core Snapdragon 660 14nm Processor with Adreno 512 GPU |
| RAM 3/4GB RAM | Â 3/4/6GB RAM |
| ROM: 32/64GB storage, expandable memory up to 512GB with microSD | 32GB/64GBÂ internal memory, expandable memory up to 2TB |
| Camera 13MP rear camera with LED flash, f/1.9 aperture, 5MP ultra-wide angle camera with f/2.2 aperture |  12MP rear camera with LED flash, Sony IMX486 sensor, f/1.8 aperture, 1.25μm pixel size, secondary 5MP camera |
| 8MP front-facing camera | 13MP front camera with f/2.0 aperture, LED flash |
| Dual 4G VoLTE, Wi-Fi 802.11 b/g/n, Bluetooth 5, GPS + GLONASS,Type-C | Dual 4G VoLTE, Wi-Fi 802.11 b/g/n, Bluetooth 5, GPS + GLONASS |
| Fingerprint sensor | fingerprint sensor |
| Battery 5000mAh battery with fast charging | 5000mAh Battery |
| Android 8.1 (Oreo) with Samsung Experience 9.5 | Android 8.1 (Oreo) |
| Dimensions: 157.9×75.5×8.5mm; Weight: 175g |
Samsung Galaxy M20 starts at Rs. 10,990 for the 3GB RAM with 32GB storage, 4GB RAM with 64GB storage version costs Rs. 12,990.. Asus Zenfone Max Pro M2 comes in Blue and Titanium Colors priced at Rs 9,999 for 3GB RAM, Rs 11,999 for 4GB RAM and 6GB RAM cost Rs 13,999. Both phones have a bigger battery, Galaxy M20 has support for fast charging, USB Type C whereas Max Pro M2 has better performance and Camera.