I think Feralis notes are best used when you already have a strong biology background. If you wanted to really ace the biology section, mastering Feralis notes would be a good idea.
Bootcamp’s biology notes didn’t exist when I took the DAT, but I’m sure that anything they put out is high quality, and definitely enough to score 20+. Previously, Bootcamp recommended reading the CliffNotes AP bio book, and that was more than enough.