ATI Mobility Radeon HD 5850 Mac Edition 's Advantages
416 additional rendering cores
Lower TDP (30W vs 50W)
NVIDIA GeForce GT 750M Mac Edition 's Advantages
Released 3 years and 10 months late
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (80.26GB/s vs 64.00GB/s)