Intel Xeon E5 4617 's Advantages
Higher base frequency (2.9GHz vs 2.8GHz)
Lower TDP (130W vs 165W)
Intel Xeon E7 8891 v3 's Advantages
Released 3 years and 1 months late
Higher specification of memory (1866 vs 3)
Larger L3 cache size (45MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)