Intel Xeon E5 2637 's Advantages
Lower TDP (80W vs 84W)
Intel Xeon E3 1226 v3 's Advantages
Released 2 years and 2 months late
Higher specification of memory (1600 vs 3)
Higher base frequency (3.3GHz vs 3GHz)
Larger L3 cache size (8MB vs 5MB)
More modern manufacturing process (22nm vs 32nm)