My estimate in integer work is that one BD core will be solidly faster than one Phenom II core,no turbo,same clocks(all around 20-25%).Add in *better* turbo,add in 33% more cores Vs Thuban,add in complete ISA support(with SSE1-4.2,AES,AVX,FMA4 and XOP) and you can imagine what happens to Thuban .