Xeon w3 2525 's Advantages
Released 10 years and 11 months late
Higher specification of memory (4400 vs 1866)
Newer PCIe version (5 vs 3)
Larger L3 cache size (22.5MB vs 10MB)
More modern manufacturing process (10nm vs 22nm)
Intel Xeon E5 1620 v2 's Advantages
Higher base frequency (3.7GHz vs 3.5GHz)
Lower TDP (130W vs 175W)