Xeon E 2186M 's Advantages
Higher base frequency (2.9GHz vs 2.8GHz)
Lower TDP (45W vs 80W)
Intel Xeon E 2378G 's Advantages
Released 3 years and 5 months late
Higher specification of memory (3200 vs 2666)
Newer PCIe version (4 vs 3)
Larger L3 cache size (16MB vs 12MB)