It's kinda like saying would you rather have Adrian Peterson or Walter Payton. Woah, woah did you just put Sweetness and All Day in the same sentence?
Yes, yes I did. It's probably more ridiculous to compare Miller and Watt's level of play to those two, but I'm not sure Watt and Miller are that different when compared to each other in that they'll both give you similar things. All this bullshit being said, I'd take Watt?