The questions in the CFAI topic tests, Kap qbank, and the Kap topic assessments are vastly different in difficulty and style. I would have to say that in terms of difficulty I would rank them in this order starting with least challenging: Qbank, CFAI topic tests, Kaplan topic assessments. Can anyone else relate?
Many people can relate, myself included. But don’t fret, you are still very early in the study process.
If I can pass (I did), anyone with perseverance and a moderate amount of book sense (common sense not required for L1) can too.