Intel Xeon E5 2609 v3 's Advantages
Larger L3 cache size (15MB vs 11MB)
Lower TDP (85W vs 120W)
Intel Xeon W 2140B 's Advantages
Released 3 years and 3 months late
Higher specification of memory (2666 vs 1600)
Higher base frequency (3.2GHz vs 1.9GHz)
More modern manufacturing process (14nm vs 22nm)