Xeon E 2186M 's Advantages
Released 3 years and 7 months late
Higher specification of memory (2666 vs 2133)
Larger L3 cache size (12MB vs 10MB)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 140W)
Intel Xeon E5 1620 v3 's Advantages
Higher base frequency (3.5GHz vs 2.9GHz)