Xeon E 2186M 's Advantages
Released 7 years late
Higher specification of memory (2666 vs 3)
Higher base frequency (2.9GHz vs 2GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 130W)
Intel Xeon E7 8850 's Advantages
Larger L3 cache size (30MB vs 12MB)