From the pure core count obviously 8 core are better than 4.
But since 8 Piledriver core are not "full" cores due to Bulldozer design, I was wondering if Operon 4 cores can be better for some improvements, or they share the same design goods and bad.
I can't find any test of a system based on 33xx Opteron, or any architecture analysis vs FX Vishera CPU.