Intel Xeon E5 2687W 's Advantages
Higher base frequency (3.1GHz vs 2.9GHz)
Larger L3 cache size (20MB vs 12MB)
Xeon E 2186M 's Advantages
Released 6 years and 1 months late
Higher specification of memory (DDR4-2666 vs DDR3)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 150W)