Opteron 1389 's Advantages
Higher base frequency (2.9GHz vs 2.7GHz)
Lower TDP (115W vs 325W)
Xeon w7 3555 's Advantages
Released 15 years and 2 months late
Higher specification of memory (4800 vs 1333)
Newer PCIe version (5 vs 2)
Larger L3 cache size (75MB vs 6MB)
More modern manufacturing process (10nm vs 45nm)