Intel Xeon E5 4669 v3 's Advantages
Lower TDP (135W vs 145W)
Xeon 6516P B 's Advantages
Released 9 years and 8 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Higher base frequency (2.3GHz vs 2.1GHz)
Larger L3 cache size (80MB vs 45MB)
More modern manufacturing process (5nm vs 22nm)