Intel Xeon E5 2687W v3 's Advantages
Larger L3 cache size (25MB vs 13.75MB)
Intel Xeon W 2155 's Advantages
Released 2 years and 11 months late
Higher specification of memory (DDR4-2666 vs DDR4-2133)
Higher base frequency (3.3GHz vs 3.1GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (140W vs 160W)