Intel Xeon E3 1220 v5 's Advantages
Lower TDP (80W vs 120W)
Intel Xeon W 2140B 's Advantages
Released 2 years and 2 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Higher base frequency (3.2GHz vs 3GHz)
Larger L3 cache size (11MB vs 8MB)