Xeon E7 8837 's Advantages
Larger L3 cache size (24MB vs 10MB)
Lower TDP (130W vs 140W)
Intel Xeon E5 1603 v3 's Advantages
Released 3 years and 5 months late
Higher specification of memory (1866 vs 1333)
Higher base frequency (2.8GHz vs 2.667GHz)
More modern manufacturing process (22nm vs 32nm)