paul_ said: the profile and shape on jag necks is certainly different in such a way that it feels bigger than the 'stang neck.
the special thing about a mustang neck (i've got one on my jag-stang) is that it starts off narrow but then doesn't get much wider by the time it gets to the 12th fret.
Other guitars like stats or jaguars taper upwards, getting wider and wider.