Opteron 6328 's Advantages
Higher base frequency (3.2GHz vs 2.2GHz)
Lower TDP (115W vs 250W)
Xeon 6731E 's Advantages
Released 11 years and 7 months late
Higher specification of memory (5600 vs 1866)
Newer PCIe version (5 vs 2)
Larger L3 cache size (96MB vs 8MB)
More modern manufacturing process (5nm vs 32nm)