NVIDIA GeForce GTX 780M Mac Edition 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 96.00GB/s)
1024 additional rendering cores
AMD Radeon RX 540X Mobile 's Advantages
Released 4 years and 5 months late
Boost Clock has increased by 52% (1211MHz vs 797MHz)
Lower TDP (50W vs 122W)