Intel Xeon E5 1681 v3 's Advantages
Higher base frequency (2.9GHz vs 2.5GHz)
Lower TDP (135W vs 300W)
Intel Xeon w7 3465X 's Advantages
Released 8 years and 5 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (75MB vs 25MB)
More modern manufacturing process (10nm vs 22nm)