Xeon E 2456 's Advantages
Released 11 years and 7 months late
Higher specification of memory (4800 vs 3)
Higher base frequency (3.3GHz vs 2GHz)
Larger L3 cache size (18MB vs 8MB)
More modern manufacturing process (10nm vs 32nm)
Intel Xeon E3 1125C 's Advantages
Lower TDP (40W vs 80W)