Intel Xeon W3680 's Advantages
Higher base frequency (3.333GHz vs 3.1GHz)
Lower TDP (130W vs 160W)
Intel Xeon E5 2687W v3 's Advantages
Released 4 years and 6 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (25MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)