Intel Xeon E3 1220L v2 's Advantages
Larger L3 cache size (8MB vs 6MB)
Lower TDP (17W vs 45W)
Intel Xeon E3 1270L v4 's Advantages
Released 3 years and 1 months late
Higher specification of memory (1866 vs 3)
Higher base frequency (3GHz vs 2.3GHz)
More modern manufacturing process (14nm vs 22nm)