Intel Xeon E3 1285L v4 's Advantages
Higher base frequency (3.4GHz vs 3.2GHz)
Lower TDP (65W vs 120W)
Intel Xeon W 2140B 's Advantages
Released 2 years and 6 months late
Higher specification of memory (2666 vs 1866)
Larger L3 cache size (11MB vs 6MB)