AMD Radeon HD 6850 1440SP Edition 's Advantages
416 additional rendering cores
AMD Radeon R9 270 1024SP 's Advantages
Released 2 years and 7 months late
Boost Clock925MHz
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (153.6GB/s vs 128.0GB/s)
Lower TDP (150W vs 151W)