Opteron 13KS EE 's Advantages
Higher base frequency (2GHz vs 1.8GHz)
Lower TDP (50W vs 225W)
Xeon 6756E 's Advantages
Released 15 years and 2 months late
Higher specification of memory (6400 vs 1333)
Newer PCIe version (5 vs 2)
Larger L3 cache size (96MB vs 6MB)
More modern manufacturing process (5nm vs 45nm)