Intel Xeon E3 1220L 's Advantages
Higher base frequency (2.2GHz vs 2GHz)
Lower TDP (20W vs 105W)
Intel Xeon E5 4620 v3 's Advantages
Released 4 years and 2 months late
Higher specification of memory (DDR4-1866 vs DDR3)
Larger L3 cache size (25MB vs 3MB)
More modern manufacturing process (22nm vs 32nm)