Qbank will only guide you to the key concepts in each reading. The questions are only drills to make you think about those concepts. Rarely you will see a vignette like the real deal. So yeah, use it to gauge your progress and understanding, but not as a learning tool.
Wiley’s practice questions came with the study package I purchased and so far, I’m pretty impressed. I’d say that 65-70% are vignette style which has been really helpful; much more than the Schweser Qbank this time around.