Intel Xeon W 2125 's Advantages
Higher base frequency (4GHz vs 2.7GHz)
Lower TDP (120W vs 325W)
Xeon w7 3555 's Advantages
Released 7 years late
Higher specification of memory (4800 vs 2666)
Newer PCIe version (5 vs 3)
Larger L3 cache size (75MB vs 8.25MB)
More modern manufacturing process (10nm vs 14nm)