First of all, I have only used one question bank (AMBOSS) and so I can't really compare with anything else. A lot of question banks out there appear to cater for USMLE or specific medical exams which is why I decided on AMBOSS which caters for general medical studies as well. Another reason I chose it was because of the knowledge cards which I use quite a bit.
AMBOSS:
(+) Questions on AMBOSS have been great (so far) to nail the clinical questions in UQ exams
(+) Huge question bank + you can customise what questions you want to show up. Usually I choose system (e.g. respiratory) and then a *difficulty of either 1/5 or 2/5 depending on where I'm at with revision.
(+) Detailed reasons for why each question is correct or incorrect and link you to the relevant card in their knowledge bank.
(+) Knowledge bank is a really good resource on its own (esp. during semester) as it succinctly summarises concepts and includes radiology/pathology images with overlays and captions to help you understand.
(-) PRICE: It is about $15 (AUD) per month for the knowledge bank + 50 questions and an additional $72/month for unlimited questions
(-) Questions are pretty difficult for 1st year* ∴ it is better to use it AFTER you have revised content
(-) Be careful with treatment questions as Australian reccomendations/medications can differ from the US (I double check with lecture material)
I'm still considering whether I'll commit for semester 2 (I'm using it for free at the moment as they gave out some COVID scholarships). If I were to use this, I would probably do $15/month normally (as I mostly use the knowledge bank and 50Qs is more than enough), then add unlimited questions ($72/month) just for the month before exams.
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EDIT forgot one!
Here's another one. Though I can't review it in depth since I haven't used it much.
MedSchoolQuiz:
(+) Based on Australia medical curriculum
(+) Difficulty is reasonable, i.e. I could use this as I was learning content
(+) Questions are divided it by year level, systems and disciplines
(+) Radiology section is great as they have labels, overlays etc. and is catered for med school level (we only need to know basics at this point)
(-) Didn't help for the difficult clinical questions I got in my exams.
(-) Not comprehensive
Online medical school quizzes
medschoolquiz.com