Intel Xeon E3 1220 v2 's Advantages
Higher base frequency (3.1GHz vs 2.3GHz)
Lower TDP (69W vs 140W)
Intel Xeon W 2191B 's Advantages
Released 5 years and 7 months late
Higher specification of memory (2666 vs 3)
Larger L3 cache size (24.75MB vs 8MB)
More modern manufacturing process (14nm vs 22nm)