Biology E/M or Chemistry ?

I’ve always liked biology more than chemistry in school but when I looked up on both of the sat exams I found that the biology is much tricker and not straight-forward as the chemistry.
Is that correct ?
If yes did the college board intend to make it harder since more students are taking the biology more than the chemistry?

I’ve taken both subject tests and I thought bio was harder but 1) I was much better at chem in the first place and 2) I actually studied for chem

I’ve taken both of them as well, and I thought bio was harder even though I’m generally better at bio (and I also prepared more for bio) than I am at chem. Chem was pretty straightforward though, so that’s probably why