Intel Xeon E3 1270 's Advantages
Higher base frequency (3.4GHz vs 2GHz)
Lower TDP (80W vs 105W)
Intel Xeon E5 4620 v3 's Advantages
Released 4 years and 2 months late
Higher specification of memory (1866 vs 3)
Larger L3 cache size (25MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)