Opteron 1389 's Advantages
Higher specification of memory (1333 vs 4)
Intel Xeon E3 1285 v6 's Advantages
Released 8 years and 2 months late
Newer PCIe version (3 vs 2)
Higher base frequency (4.1GHz vs 2.9GHz)
Larger L3 cache size (8MB vs 6MB)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (79W vs 115W)