CFAI past exams vs Schweser mock exams model answers

I’ve done CFAI past exams as well as the Schweser mock exams. In the CFA exam model answers, they go into quite a bit of detail in many answers, far more than I would have expected.

Compare that to Schweser’s mock exam model answers. They are succinct and get straight to the point without much extra information at all. Often, their answers are just a few words. Schweser gives more detail about the answer in “Candidate discussion”.

What I’m thinking is that the CFA answers combine the succinct model answer and candidate discussion in a single form, but Schweser separates the 2.

Does anyone have any insight into this?