Xeon E 2456 's Advantages
Released 11 years and 7 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (18MB vs 8MB)
More modern manufacturing process (10nm vs 22nm)
Intel Xeon E3 1245 v2 's Advantages
Higher base frequency (3.4GHz vs 3.3GHz)
Lower TDP (77W vs 80W)