Opteron 1389 's Advantages
Higher base frequency (2.9GHz vs 2.1GHz)
Xeon W 11955M 's Advantages
Released 11 years and 11 months late
Higher specification of memory (3200 vs 1333)
Newer PCIe version (4 vs 2)
Larger L3 cache size (24MB vs 6MB)
More modern manufacturing process (10nm vs 45nm)
Lower TDP (35W vs 115W)