AMD Radeon R9 370 's Advantages
Larger VRAM bandwidth (179.2GB/s vs 96.00GB/s)
768 additional rendering cores
AMD Radeon RX 550X 's Advantages
Released 3 years and 7 months late
Boost Clock has increased by 21% (1183MHz vs 975MHz)
More VRAM (4GB vs 2GB)
Lower TDP (50W vs 110W)