Intel Xeon E5 2407 's Advantages
Higher base frequency (2.2GHz vs 2GHz)
Lower TDP (80W vs 120W)
Intel Xeon E5 2683 v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (2133 vs 3)
Larger L3 cache size (35MB vs 10MB)
More modern manufacturing process (22nm vs 32nm)