Intel Xeon E5 2637 's Advantages
Lower TDP (80W vs 120W)
Intel Xeon W 2150B 's Advantages
Released 5 years and 9 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Larger L3 cache size (13.75MB vs 5MB)
More modern manufacturing process (14nm vs 32nm)