Intel Xeon E5 2663 v3 's Advantages
Released 3 years and 5 months late
Higher specification of memory (2133 vs 3)
Larger L3 cache size (25MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E3 1220 's Advantages
Higher base frequency (3.1GHz vs 2.8GHz)
Lower TDP (80W vs 105W)