Intel Xeon W3680 's Advantages
Higher base frequency (3.333GHz vs 2.9GHz)
Xeon E 2186M 's Advantages
Released 8 years and 1 months late
Higher specification of memory (2666 vs 3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 130W)