To me, Tegra2 is much worse than OMAP or any other Cortex ARM8 or 9 SoC's due to its weak multimedia capability. (especially pointing to high profile H264 video support) OMAP 4430 used on LG Optimus 3D is as fast or faster than Galaxy S2 in terms of 3D graphics and runs all the same games. So there is no real difference. It's just that OMAP isn't used as much as Tegra2 or Qualcomm right now that's all. But that doesn't mean it's less capable at all.