Intel Xeon E7 8891 v3 's Advantages
Higher base frequency (2.8GHz vs 2.2GHz)
Lower TDP (165W vs 330W)
Xeon 6780E 's Advantages
Released 9 years late
Higher specification of memory (6400 vs 1866)
Newer PCIe version (5 vs 3)
Larger L3 cache size (108MB vs 45MB)
More modern manufacturing process (5nm vs 22nm)