Opteron 1381 's Advantages
Released 2 years and 10 months late
Higher specification of memory (1333 vs 2)
Newer PCIe version (2 vs 1)
More modern manufacturing process (45nm vs 90nm)
Lower TDP (115W vs 119W)
Opteron 2220 SE (F2) 's Advantages
Higher base frequency (2.8GHz vs 2.5GHz)