Otabek

Lvl 2 passer here n studied Schweser exclusively except cfai ethics EOC.

I'd say 1 in 20 questions, or 5%, of my lvl 1 exam had content I've neva seen b4. Did I freak out and regret not spending another 200 hrs reading cfai? Definitely not. Make an educated guess and move on. Lvl 2 is about 1 in 15 that cannot be determined by Schweser alone.

Candidates must realise that your brain can't memorize all the trivial pursuit questions out there anyway. 3rd party providers have yrs of experience to know what is more likely to b on the exam than all the minor stuff.

tl;dr
Get Schweser and you'll get the majority of questions at least recognisable. CFAI will really blow ur memory out.