AMD Radeon R9 M270X 's Advantages
Larger VRAM bandwidth (88.00GB/s vs 48.00GB/s)
128 additional rendering cores
AMD Radeon 550X Mobile 's Advantages
Released 3 years and 2 months late
Boost Clock has increased by 29% (1287MHz vs 1000MHz)
More VRAM (4GB vs 2GB)