I think it's a bit more percussive with a pick, and I find timing a bit tighter. But, I have no tip to my right index finger, and poor coordination with the other fingers, so I find I'm unable to do a waling style with my right hand. That said, because I don't have that tip, holding a pick is a little uncomfortable, so generally I alternate between pick and fingers as the song dictates, ie faster riffs need the pick. In any even I would rather play finger style as I love the feel of it, and it feels like proper playing.