Intel Xeon E5 2637 's Advantages
Lower TDP (80W vs 95W)
Intel Xeon E3 1285 v4 's Advantages
Released 3 years and 3 months late
Higher specification of memory (DDR3-1866 vs DDR3)
Higher base frequency (3.5GHz vs 3GHz)
Larger L3 cache size (6MB vs 5MB)
More modern manufacturing process (14nm vs 32nm)