Xeon E7 4850 's Advantages
Larger L3 cache size (24MB vs 12MB)
Xeon E 2186M 's Advantages
Released 7 years late
Higher specification of memory (2666 vs 1333)
Higher base frequency (2.9GHz vs 2GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 130W)