Intel Xeon W 2155 's Advantages
Released 7 years and 5 months late
Higher specification of memory (2666 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (3.3GHz vs 1.866GHz)
More modern manufacturing process (14nm vs 45nm)
Xeon L7555 's Advantages
Larger L3 cache size (18MB vs 13.75MB)
Lower TDP (95W vs 140W)