Intel Xeon E5 2620 v2 's Advantages
Released 1 years and 4 months late
More modern manufacturing process (22nm vs 32nm)
Lower TDP (80W vs 130W)
Intel Xeon E5 4620 's Advantages
Higher base frequency (2.2GHz vs 2.1GHz)
Larger L3 cache size (16MB vs 15MB)