AMD Radeon RX 560DX 's Advantages
More VRAM (4GB vs 2GB)
384 additional rendering cores
AMD Radeon 550X 's Advantages
Released 11 months late
Boost Clock has increased by 4% (1218MHz vs 1175MHz)
Larger VRAM bandwidth (112.0GB/s vs 96.00GB/s)
Lower TDP (50W vs 65W)