as far as i understood its scalable from 1-4, so it includes 4 cores, but if only 1 is needed, the others are deactivated/standby.

I have found a few links about the SGS2, it has a samsung exynos cpu with the mali gpu, and they are always talking about 4 cores.

comparing the benchmarks of the sgs2 at anandtech wouldnt make sense at the moment because we will have another (higher) resolution, another cpu and another os (which is important too, imho). and the circumstances of the SoC (how is the ram connected to the rest of the system and things like that) is importand for the performance too.