Intel Xeon E7 8891 v3 's Advantages
Higher specification of memory (1866 vs 4)
Higher base frequency (2.8GHz vs 2.2GHz)
Larger L3 cache size (45MB vs 1.5MB)
Intel Xeon D 1531 's Advantages
More modern manufacturing process (14nm vs 22nm)
Lower TDP (35W vs 165W)