Intel Xeon E3 1240 v3 's Advantages
Higher base frequency (3.4GHz vs 3.2GHz)
Lower TDP (80W vs 120W)
Intel Xeon W 2140B 's Advantages
Released 4 years and 6 months late
Higher specification of memory (2666 vs 1600)
Larger L3 cache size (11MB vs 8MB)
More modern manufacturing process (14nm vs 22nm)