AMD Radeon HD 8970M 's Advantages
Released 1 years and 9 months late
Boost Clock900MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (153.6GB/s vs 115.2GB/s)
320 additional rendering cores
AMD Radeon HD 6970M Mac Edition 's Advantages
Lower TDP (75W vs 100W)