Intel Xeon E5 2620 v2 's Advantages
Released 5 years and 6 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 45nm)
Xeon L5420 's Advantages
Higher specification of memory (3 vs 3)
Higher base frequency (2.5GHz vs 2.1GHz)
Lower TDP (50W vs 80W)