Xeon E7 4807 's Advantages
Higher specification of memory (1333 vs 3)
Larger L3 cache size (18MB vs 10MB)
Lower TDP (95W vs 130W)
Intel Xeon E5 2637 v2 's Advantages
Released 2 years and 5 months late
Higher base frequency (3.5GHz vs 1.866GHz)
More modern manufacturing process (22nm vs 32nm)