Intel Xeon E5 2637 v2 's Advantages
Higher base frequency (3.5GHz vs 3.3GHz)
Xeon E 2456 's Advantages
Released 10 years and 3 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (18MB vs 10MB)
More modern manufacturing process (10nm vs 22nm)
Lower TDP (80W vs 130W)