Not only do we not know if the U.S. GS2 will have a Tegra 2 or Exynos....now there is rumors the T Mobile version might have a Snapdragon....
Samsung Hercules confirmed as a T-Mobile Galaxy S II variant -- Engadget
Thank you, I was going to post that myself just to illustrate that the Exynos processor is NOT a guarantee in the U.S. market. There was speculation when the SGSII was first announced that it would possibly have different SoCs in different regions.
To summarize... we still have no idea what the SGSII will be like on Verizon, the Bionic has (I believe) one benchmark leaked on pre-production firmware, and people are claiming the SGSII smokes it despite the fact that the Optimus 3D (which likely has the same processor from the Bionic) holds it's own and beats the Exynos in multiple benchmarks:
AnandTech - LG Optimus 3D Preliminary Performance - OMAP4 Tested
I'd love for somebody to post any credible benchmarks of the SGSII smoking the Bionic...and they better not be Quadrant benchmarks, which are totally useless and able to be duped.
Brandon