Intel Xeon W 2155 's Advantages
Released 5 years and 3 months late
Higher specification of memory (2666 vs 3)
Higher base frequency (3.3GHz vs 3.1GHz)
Larger L3 cache size (13.75MB vs 8MB)
More modern manufacturing process (14nm vs 22nm)
Intel Xeon E3 1220 v2 's Advantages
Lower TDP (69W vs 140W)