Intel Xeon E5 2686 v3 's Advantages
Lower TDP (120W vs 175W)
Xeon 6523P B 's Advantages
Released 10 years and 5 months late
Higher specification of memory (5600 vs 2133)
Newer PCIe version (5 vs 3)
Higher base frequency (2.5GHz vs 2GHz)
Larger L3 cache size (96MB vs 45MB)
More modern manufacturing process (5nm vs 22nm)