Opteron 6366 HE 's Advantages
Lower TDP (85W vs 129W)
Xeon D 2799 's Advantages
Released 9 years and 3 months late
Higher specification of memory (3200 vs 1866)
Newer PCIe version (4 vs 2)
Higher base frequency (2.4GHz vs 1.8GHz)
Larger L3 cache size (30MB vs 8MB)
More modern manufacturing process (10nm vs 32nm)