NVIDIA GeForce 8600M GT Mac Edition 's Advantages
Lower TDP (20W vs 30W)
ATI Mobility Radeon HD 5850 Mac Edition 's Advantages
Released 2 years and 3 months late
More VRAM (1024GB vs 512GB)
Larger VRAM bandwidth (64.00GB/s vs 20.32GB/s)
768 additional rendering cores