AMD Radeon Pro W5700X 's Advantages
More VRAM (16GB vs 8GB)
Larger VRAM bandwidth (448.0GB/s vs 224.0GB/s)
768 additional rendering cores
AMD Radeon Pro W6600 's Advantages
Released 1 years and 6 months late
Boost Clock has increased by 26% (2580MHz vs 2040MHz)
Lower TDP (100W vs 205W)