Intel Xeon E3 1275 v5 's Advantages
Higher base frequency (3.6GHz vs 3.2GHz)
Intel Xeon W 11855M 's Advantages
Released 5 years and 7 months late
Higher specification of memory (3200 vs 2133)
Newer PCIe version (4 vs 3)
Larger L3 cache size (18MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (35W vs 80W)