Intel Xeon E3 1283L v4 's Advantages
Released 9 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (47W vs 135W)
Intel Xeon E5 2637 v3 's Advantages
Higher specification of memory (2133 vs 1866)
Higher base frequency (3.5GHz vs 2.9GHz)
Larger L3 cache size (15MB vs 6MB)