Intel Xeon E5 4648 v3 's Advantages
Lower TDP (105W vs 160W)
Xeon 6543P B 's Advantages
Released 9 years and 8 months late
Higher specification of memory (5600 vs 1866)
Newer PCIe version (5 vs 3)
Higher base frequency (2GHz vs 1.7GHz)
Larger L3 cache size (128MB vs 30MB)
More modern manufacturing process (5nm vs 22nm)