Intel Xeon W 2155 's Advantages
Released 3 years and 11 months late
Higher specification of memory (2666 vs 3)
Larger L3 cache size (13.75MB vs 10MB)
More modern manufacturing process (14nm vs 22nm)
Intel Xeon E5 2637 v2 's Advantages
Higher base frequency (3.5GHz vs 3.3GHz)
Lower TDP (130W vs 140W)