AMD Radeon Pro Duo Polaris 's Advantages
Released 2 years and 1 months late
More VRAM (16GB vs 2GB)
Larger VRAM bandwidth (224.0GB/s vs 153.6GB/s)
1280 additional rendering cores
AMD Radeon R9 270 1024SP 's Advantages
Boost Clock925MHz
Lower TDP (150W vs 250W)