I always carry both, and I'm talking about folders. I carry a larger knife, usually 3.5" blade and up. Most of my large edc's are in the ~4.0" range. I carry a smaller knife, a slipjoint that ranges anywhere between 3.5 to 4.0" in the closed position. I usually carry the larger knife just to carry it. It is rare for me to use it, but it is usually a unique knife and one I really like and carrying it is something I do. The smaller knife is what I usually use and it will be anywhere from 2 to 4 bladed.
So I don't know if this really helps or not since the large folder I carry is usually a "show" piece.