Xeon w3 2525 's Advantages
Released 9 years and 2 months late
Higher specification of memory (4400 vs 1866)
Newer PCIe version (5 vs 3)
Higher base frequency (3.5GHz vs 2GHz)
Larger L3 cache size (22.5MB vs 20MB)
More modern manufacturing process (10nm vs 22nm)
Intel Xeon E7 4809 v3 's Advantages
Lower TDP (115W vs 175W)