Xeon E 2456 's Advantages
Released 9 years and 3 months late
Higher specification of memory (DDR5-4800 vs DDR4-2133)
Newer PCIe version (5 vs 3)
Higher base frequency (3.3GHz vs 2.3GHz)
More modern manufacturing process (10nm vs 22nm)
Lower TDP (80W vs 135W)
Intel Xeon E5 2698 v3 's Advantages
Larger L3 cache size (40MB vs 18MB)