Intel Xeon W3680 's Advantages
Higher base frequency (3.333GHz vs 2.5GHz)
Larger L3 cache size (12MB vs 8MB)
Intel Xeon E3 1265L 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 (45W vs 130W)