Intel Xeon E5 2669 v3 's Advantages
Lower TDP (120W vs 325W)
Xeon w7 3555 's Advantages
Released 9 years and 7 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Higher base frequency (2.7GHz vs 2.3GHz)
Larger L3 cache size (75MB vs 30MB)
More modern manufacturing process (10nm vs 22nm)