I have taken both the DAT and the PCAT and I have to say that the DAT is much harder. I studied two months for the DAT the first time I took it and was very surprised at how hard the real test was compared to the practice tests that are available. I then took the PCAT and did not study for it at all and I still got 80% up. If I had even prepared a week, I think I could have cracked the 90% range, but I had a tough semester and focused more on my classes. I recently took the DAT again and although I did score well in the academic portion this time around, the perceptual ability still will keep me out. The DAT science portion requires much more detailed info than the PCAT. The PCAT is simply recalling basic info from classes where the DAT has several questions that require you apply your knowledge. The math sections are similar but different as well. The PCAT has calculus but the test I took only had maybe 3-4 cal questions and they were very basic and easy. The DAT has hard trig, word promblems, and tougher geometry questions. Also, on the DAT, you can barely miss anything in the sciences if you want a good score. Finally, I got accepted to Pharmacy and not to Dental but take that with a grain of salt because I have the AA for Dental school just not the PAT. I guess now all that is left for me to try is the MCAT!