Xeon w7 3555 's Advantages
Released 12 years and 5 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (75MB vs 15MB)
More modern manufacturing process (10nm vs 32nm)
Intel Xeon E5 1660 's Advantages
Higher base frequency (3.3GHz vs 2.7GHz)
Lower TDP (130W vs 325W)