You are right - there are many similarities. In fact, our Dean of Faculty came from Harvey Mudd. I think that Olin has a bit more freedom to innovate, though, given it's young age (fourth graduating class this year). There is a joke around campus that no class has ever been the same for two years - in almost every case, there are significant overhauls that result from student feedback. While this makes things tumultuous (and of course there is no guarantee that change is good), it is clear that the profs are not willing to settle on something that is just "good" or "acceptable". Did you get this feeling at HMC?

I can't really make a more detailed comparison without more information about what aspects of Harvey Mudd you find similar.