No difference whatsoever. They don't grade requests based on how they receive them
The things I like about using TP is, (and this is a biggie) I don't have to remember to do it, they do and they use "codes familiar to room assigners". It's not just that it lets them know what room I like, it gives them info on the things I like about the room, such as floor, direction it faces, etc so they can use that info to find other rooms that fit similar parameters.