Online Schweser questions VS Practice Exam questions VS...

Hi, can anybody pls let me know if there’s any difference (in terms of difficulty/similarity with the CFA exam) between the online questions on the Schweser website, the ones at the end of each chapter and the ones in the hard copy of the practice exams? Also, what about the CFA EOC questions? I’ll start today doing soke questions and I’d like to know how to prioritize… Thank you so much!!! Stefano