Intel Xeon W 2155 's Advantages
Released 2 years and 11 months late
Higher specification of memory (2666 vs 2133)
More modern manufacturing process (14nm vs 22nm)
Intel Xeon E5 2643 v3 's Advantages
Higher base frequency (3.4GHz vs 3.3GHz)
Larger L3 cache size (20MB vs 13.75MB)
Lower TDP (135W vs 140W)