Everyone seems to be missing the real question- Who is taller? Really, I want to know, usually Mr. Sanderson gives very good and detailed comparisons of height for his characters. But he hasn't done so in this, mostly because there wasn't any natural way to introduce it yet.
In Way of Kings, several mentions of Kaladin being unnaturally tall have been made. Cenn (the new recruit in the beginning) describes Dallet as "mountainous" and Kaladin is described as "several fingers taller than even Dallet." So he's pretty tall.
The only mention I've been able to find of Adolin's height is in Words of Radiance (I'm on chapter 16) when both Kaladin and Adolin are face to face, and he says the "son of Dalinar was a tall man" or something. But explicitly, who is taller? I would love if Kaladin is. Please, can someone find anything in the text saying so?