You did not change the processor out of the phone for another. Your hardware is the CPU. Kernel is software, not the hardware. Overclocking your hardware, you can take the Bionic to 1.2 fairly safely, and might be able to run yours at 1.3 (some have). 1.5 tends to have audio issues and not as stable. Don't believe me, go talk to others on XDA.

You are not overclocking to 2.3, period. Not possible. And 2 cores on 1 processor do not add their values together.