Greetings again my friend!
For learning, the CFA ecosystem multiple choice questions are great.
But in the final weeks I would recommend switching to mocks and doing several of them. I typically did all the CFA ecosystm MCQs (or as many as I could tolerate) up to 4-6 weeks before the exam date. Then I switched to solely mocks. The plan is not to ace all the mocks, but to take many of them and diligently study all the questions you get wrong. That’s how to come in with a great basis, in my experience at least.
The reason for this is exactly as you’ve pointed out. The mocks are trickier in their wording. That is also how the exam will be written, in that trickier style. So the key to success, in my personal opinion at least, is to take enough mocks to get fluent in that trickier style and to learn the clues and command words the Institute typically drops into similar topic question setups, so you can more easily decode and answer everything. It’s not the first step of the study process surely, but it will greatly help I think if it’s your final step. Otherwise there is a risk when the exam comes, no matter how much you studied, the wording and different complexity level can frustrate you on the most important day.
Having said that, Level 1 is the most “linear” of the 3 levels so you might be able to pull it off with just MCQ practice questions. But it’s a much lower risk if you spend at least a few weeks doing practice mocks instead of the less nuanced MCQ question bank pool. Totally up to you of course.
Cheers - good luck - you got this👍