These pics aren't perfect for a comp but my guess is it's the same width since the door glass has to be in the same plane but, you are right, the car looks wider, IMO.
Probably because the fenders have a different cut to them to accomodate the tonneau flap. The back window is smaller (because of frame mechanism?) and the window sill must be higher for retraction so it all makes it look chunkier (wider)?
Verrry interesting... .