NVIDIA GeForce GTX 780M Mac Edition 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 72.00GB/s)
1024 additional rendering cores
AMD Radeon R7 M465X 's Advantages
Released 2 years and 6 months late
Boost Clock has increased by 16% (925MHz vs 797MHz)