Intel Xeon E5 2648L v3 's Advantages
Larger L3 cache size (30MB vs 18MB)
Lower TDP (75W vs 80W)
Xeon E 2456 's Advantages
Released 9 years and 3 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Higher base frequency (3.3GHz vs 1.8GHz)
More modern manufacturing process (10nm vs 22nm)