Intel Xeon E5 2665 's Advantages
Larger L3 cache size (20MB vs 15MB)
Lower TDP (115W vs 130W)
Intel Xeon w3 2425 's Advantages
Released 10 years and 11 months late
Higher specification of memory (4400 vs 3)
Newer PCIe version (5 vs 3)
Higher base frequency (3GHz vs 2.4GHz)
More modern manufacturing process (10nm vs 32nm)