AMD Radeon Pro Vega 56 's Advantages
Released 3 years and 9 months late
Boost Clock has increased by 57% (1250MHz vs 797MHz)
More VRAM (8GB vs 4GB)
Larger VRAM bandwidth (402.4GB/s vs 160.0GB/s)
2048 additional rendering cores
NVIDIA GeForce GTX 780M Mac Edition 's Advantages
Lower TDP (122W vs 210W)