AMD Radeon R7 240 's Advantages
Lower TDP (30W vs 53W)
AMD Radeon RX 6400 's Advantages
Released 8 years and 3 months late
Boost Clock has increased by 198% (2321MHz vs 780MHz)
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (128.0GB/s vs 28.80GB/s)
448 additional rendering cores