NVIDIA GeForce GTX 780M Mac Edition 's Advantages
Released 2 years and 7 months late
Boost Clock797MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 115.2GB/s)
576 additional rendering cores
AMD FirePro M8900 's Advantages
Lower TDP (75W vs 122W)