Intel Xeon E5 2407 's Advantages
Lower TDP (80W vs 85W)
Intel Xeon E5 2620 v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (1866 vs 3)
Higher base frequency (2.4GHz vs 2.2GHz)
Larger L3 cache size (15MB vs 10MB)
More modern manufacturing process (22nm vs 32nm)