AMD Radeon Pro Vega 56 's Advantages
More VRAM (8GB vs 4GB)
Larger VRAM bandwidth (402.4GB/s vs 96.00GB/s)
2560 additional rendering cores
NVIDIA T550 Mobile 's Advantages
Released 4 years and 9 months late
Boost Clock has increased by 33% (1665MHz vs 1250MHz)
Lower TDP (23W vs 210W)