Opteron 1352 (B2) 's Advantages
Lower TDP (95W vs 115W)
Opteron 1381 's Advantages
Released 1 years late
Higher specification of memory (1333 vs 800)
Higher base frequency (2.5GHz vs 2.1GHz)
Larger L3 cache size (6MB vs 2MB)
More modern manufacturing process (45nm vs 65nm)