AMD Radeon Pro 580X 's Advantages
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (218.9GB/s vs 96.00GB/s)
1280 additional rendering cores
NVIDIA GeForce MX550 's Advantages
Released 2 years and 10 months late
Boost Clock has increased by 10% (1320MHz vs 1200MHz)
Lower TDP (25W vs 185W)