Intel Xeon E5 2620 v2 's Advantages
Larger L3 cache size (15MB vs 11MB)
Lower TDP (80W vs 140W)
Intel Xeon W 2145 's Advantages
Released 3 years and 11 months late
Higher specification of memory (2666 vs 3)
Higher base frequency (3.7GHz vs 2.1GHz)
More modern manufacturing process (14nm vs 22nm)