Opteron 6380 's Advantages
Released 6 months late
Higher specification of memory (1866 vs 3)
Higher base frequency (2.5GHz vs 2.2GHz)
Lower TDP (115W vs 130W)
Intel Xeon E5 4620 's Advantages
Newer PCIe version (3 vs 2)
Larger L3 cache size (16MB vs 8MB)