Intel Xeon E5 2680 's Advantages
Higher base frequency (2.7GHz vs 2.3GHz)
Lower TDP (130W vs 140W)
Intel Xeon W 2191B 's Advantages
Released 5 years and 9 months late
Higher specification of memory (2666 vs 3)
Larger L3 cache size (24.75MB vs 20MB)
More modern manufacturing process (14nm vs 32nm)