Intel Xeon E3 1220 v2 's Advantages
Higher base frequency (3.1GHz vs 3GHz)
Larger L3 cache size (8MB vs 6MB)
Intel Xeon E3 1270L v4 's Advantages
Released 3 years and 1 months late
Higher specification of memory (1866 vs 3)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 69W)