Intel Xeon E5 2669 v3 's Advantages
Lower TDP (120W vs 145W)
Xeon 6516P B 's Advantages
Released 10 years and 1 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (80MB vs 30MB)
More modern manufacturing process (5nm vs 22nm)