Intel Xeon E5 2643 v3 's Advantages
Higher base frequency (3.4GHz vs 3.3GHz)
Lower TDP (135W vs 210W)
Xeon w7 2555X 's Advantages
Released 9 years and 11 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (33.75MB vs 20MB)
More modern manufacturing process (10nm vs 22nm)