NVIDIA GeForce 825M 's Advantages
Boost Clock has increased by 11% (941MHz vs 850MHz)
64 additional rendering cores
AMD Radeon R5 M420 's Advantages
Released 2 years and 4 months late
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (16.00GB/s vs 14.40GB/s)