Intel Xeon E3 1240 v3 's Advantages
Lower TDP (80W vs 135W)
Intel Xeon E5 2637 v3 's Advantages
Released 1 years and 3 months late
Higher specification of memory (2133 vs 1600)
Higher base frequency (3.5GHz vs 3.4GHz)
Larger L3 cache size (15MB vs 8MB)