AMD Radeon R7 240 's Advantages
Lower TDP (30W vs 50W)
AMD Radeon RX 550X 's Advantages
Released 5 years and 2 months late
Boost Clock has increased by 52% (1183MHz vs 780MHz)
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (96.00GB/s vs 28.80GB/s)
192 additional rendering cores