Intel Xeon E7 8891 v3 's Advantages
Released 4 years and 2 months late
Higher specification of memory (1866 vs 1333)
Higher base frequency (2.8GHz vs 2GHz)
Larger L3 cache size (45MB vs 18MB)
More modern manufacturing process (22nm vs 32nm)
Xeon E7 2820 's Advantages
Lower TDP (105W vs 165W)