Intel Xeon W 2191B 's Advantages
Released 3 years and 11 months late
Higher specification of memory (2666 vs 1600)
Newer PCIe version (3 vs 2)
Larger L3 cache size (24.75MB vs 8MB)
More modern manufacturing process (14nm vs 32nm)
Opteron 6338P 's Advantages
Lower TDP (99W vs 140W)