As for the two authors: Maya's fic very rarely ventured into R-rated territory, and I don't think she ever described graphic penetration in those few sex scenes. I remember trying to figure out whether Harry tops Draco (Harry tops with another man in the story) in Drop Dead Gorgeous, and the sex scene is done in such a skillful way that it's impossible to say. :)

Calanthe, on the other hand, is a rather graphic writer. I think the majority of her fics are bottom!Draco, with notable exceptions (Bad Blood, e.g.). I have them saved, and can check, if you're interested.