Intel Xeon E3 1220 v2 's Advantages
Lower TDP (69W vs 120W)
Intel Xeon W 2125 's Advantages
Released 5 years and 3 months late
Higher specification of memory (2666 vs 3)
Higher base frequency (4GHz vs 3.1GHz)
Larger L3 cache size (8.25MB vs 8MB)
More modern manufacturing process (14nm vs 22nm)