Intel Xeon E7 8891 v3 's Advantages
Larger L3 cache size (45MB vs 18MB)
Xeon E 2456 's Advantages
Released 8 years and 6 months late
Higher specification of memory (DDR5-4800 vs DDR3)
Newer PCIe version (5 vs 3)
Higher base frequency (3.3GHz vs 2.8GHz)
More modern manufacturing process (10nm vs 22nm)
Lower TDP (80W vs 165W)