AMD Radeon R9 M395X Mac Edition 's Advantages
Released 3 years and 10 months late
More VRAM (4GB vs 1GB)
Larger VRAM bandwidth (174.7GB/s vs 70.40GB/s)
1248 additional rendering cores
AMD Radeon HD 6990M Rebrand 's Advantages
Lower TDP (100W vs 250W)