Opteron 6276 's Advantages
Lower TDP (115W vs 140W)
Intel Xeon W 2191B 's Advantages
Released 6 years and 1 months late
Higher specification of memory (2666 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (24.75MB vs 8MB)
More modern manufacturing process (14nm vs 32nm)