Okay, I've noticed after doing the UWorld self-assessment that those questions are longer than the standard UWorld Qbank questions, so they didn't just rehash a bunch of those questions for the assessment. So the UWorld self-assessment must be closer to the real thing. I failed the self-assessment (48%) but took it too early after just 5 days studying to assess if I could take the real thing early, but am now making 60-70% on the Qbank. Not sure how to analyze how ready I am for it now.