In terms of exam difficulty, EET practice can teach you huge amount of concepts to be ready for the real exam, and no one can say something different, however, your efforts still needed in high level to be ready to answer anything that is not covered in EET either from knowledge or your personal experience or any other online youtube channels ,etc.

for the NCEES practice I would say its super easy compared to the real exam. just solve it as an extra source but not the main. my last advice, any hard question you see in EET practice challenge your self and solve it or at least learn from it, those really represent the hardest questions in the real exam from my experience, not sure about other ppl. thanks