Intel Xeon E5 2670 's Advantages
Larger L3 cache size (20MB vs 11MB)
Lower TDP (115W vs 120W)
Intel Xeon W 2140B 's Advantages
Released 5 years and 9 months late
Higher specification of memory (2666 vs 3)
Higher base frequency (3.2GHz vs 2.6GHz)
More modern manufacturing process (14nm vs 32nm)