I'll bet dimes to dollars it makes no diff anyway.. Why do you need to overclock this phone? To showoff some slightly higher benchmark scores that nobody really cares about anyway? The phone performs great but... Meh whatever..
Lol I'm not trying to pick on you bud, just tired of seeing people rave about overclocking this and that on every forum and in the end they never have a good reason to go through all the trouble lol. Flashing an optimized, well made ROM is going to do a lot more for your performance than oc'ing.
In any case, I believe the answer to your question is the razr's processor is actually oc'd already, that's why the diff. I could be mistaken however but im pretty sure about it.