Opteron 6168 's Advantages
Lower TDP (115W vs 140W)
Intel Xeon W 2191B 's Advantages
Released 7 years and 9 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.3GHz vs 1.9GHz)
Larger L3 cache size (24.75MB vs 12MB)