Xeon E7 4807 's Advantages
Lower TDP (95W vs 165W)
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 1.866GHz)
Larger L3 cache size (45MB vs 18MB)
More modern manufacturing process (22nm vs 32nm)