TPR scores were consistently lower. i can't remember about comparisons in difficulty, but the grading by TPR was much more stringent than MCAT
week b4 MCAT with final TPR test (i think AAMC #6, not sure)
8 8 9
on MCAT
10 10 11
don't get worried, tons of my friends did mediocre during the class and great come game time
good luck