Opteron 1389 's Advantages
Higher base frequency (2.9GHz vs 2.8GHz)
Xeon E 2478 's Advantages
Released 14 years and 6 months late
Higher specification of memory (4800 vs 1333)
Newer PCIe version (5 vs 2)
Larger L3 cache size (24MB vs 6MB)
More modern manufacturing process (10nm vs 45nm)
Lower TDP (80W vs 115W)