I'll explain it this way:
If you are a person who is happy to learn the material on your own, knowing that class will be a discussion of arcane minutiae between gunners (and you probably fit this label) and the professor, and thinks this outweighs open grade deflation, then you might enjoy taking it from one professor.
If you think it is a difficult subject and you would like to really understand it by the end of the quarter through a professor who explains clearly and leads well-focused class discussion, but with less theory, then you might enjoy taking it from the other.
There are people who fall into both camps. I chose...poorly.