Intel Xeon E5 2663 v3 's Advantages
Released 2 years and 6 months late
Higher specification of memory (2133 vs 3)
Higher base frequency (2.8GHz vs 2.4GHz)
Larger L3 cache size (25MB vs 10MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 2609 's Advantages
Lower TDP (80W vs 105W)