AMD Radeon HD 8970M 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (153.6GB/s vs 14.40GB/s)
768 additional rendering cores
NVIDIA GeForce 940M 's Advantages
Released 1 years and 10 months late
Boost Clock has increased by 22% (1098MHz vs 900MHz)
Lower TDP (75W vs 100W)