Wide angle distortion crop/ff

[Blue Eagle]

I was wondering, you get a shallower depth of field from a full frame camera (amongst other things) but will the perspective/distortion be greater/worse/same on a full frame camera vs crop.

So if when taking portraits in cramp locations, is say 30mm on a 5D going to look better than using 18mm on a crop body, in that you get the same field of view, but reduced distortion?

 

[mr_pants]

Perspective distortion would be the same for the same "equivalent" focal lengths, as it is a function of relative distances from the camera.