I don't think there is much difference in difficulty b/w a top private grade-inflated school like Harvard or Stanford and a tough public school like Michigan or Berkeley. But, for most public schools, despite the difference in avg. GPA's, it is harder to get better grades at the private school. The difference in the competitiveness, intelligence, and work ethic of the students is simply too large.<--I know I'm gonna get flamed for this comment. I'm not referring to any SDNers but those of you who attend state schools know approx. what percentage of your class are actually serious premeds.
Case in point, one of my friends showed me his orgo exam from UC Davis. To be perfectly honest, it was not much different than my orgo midterm at Cornell in terms of material and difficulty. So what was the difference? The mean on his midterm was a 39 while the mean on my orgo midterms is around a 65. I generally have to get approx. 80 to get an A- in the class. Are you telling me if I get an 80 at UC Davis when the mean is 39, I wouldn't at least get an A-? I would be considered an orgo god while at Cornell I barely got an A-.