Intel Xeon E3 1220 v2 's Advantages
Released 2 years and 2 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (69W vs 130W)
Intel Xeon W3680 's Advantages
Higher base frequency (3.333GHz vs 3.1GHz)
Larger L3 cache size (12MB vs 8MB)