Intel Xeon E5 1428L v2 's Advantages
Larger L3 cache size (15MB vs 11MB)
Lower TDP (60W vs 120W)
Intel Xeon W 2140B 's Advantages
Released 3 years and 11 months late
Higher specification of memory (2666 vs 1333)
Higher base frequency (3.2GHz vs 2.2GHz)
More modern manufacturing process (14nm vs 22nm)