I just took the OAT today I ended up scoring:
BIO: 310
GEN CHEM: 380
ORGO: 320
Reading: 290 🙁
Physics: 310
OR: 320
AA: 320
TS: 330
I would say the ADA test is most similar but the Reading and QR were much harder than ADA. The second passage of reading was really difficult. I was really pissed off that I needed to go to the bathroom during the reading test ended up wasting 5 minutes of my time taking an unscheduled break but otherwise I literally would've pissed in my pants. I went to bathroom before the test too but I guess nervousness got to me. ADA is similar with Biology, organic, gchem, and physics. Overall all I used to study were cliffnotes for Biology, Chads videos for gen chem, ochem, and physics. I used the OAT destroyer. I did all the OR and physics problems and most of the bio, chem, and ochem problems. The kaplan test physics is just insane. Kaplan just scores low because they advertise "Guaranteed Higher Scores". Overall I'm happy with my score and to be done!