A different ROM will not change how a muscle grows. It will change strength at different angles, but the muscle shape will not change because of it.
Like tuna guy said, there's SOME, and I repeat SOME evidence out there that certain fibers/portions of a muscle can be preferentially activated, but that's usually under very SUB-maximal load, such as during finely controlled work.
However, even IF a muscle could contract only a certain portion of itself under high stress, (and therefore cause site-specific growth), (which I maintain is bollox), changing the angle of the hand or width of the grip would CERTAINLY not make a difference.
If you were to argue that bent-over BB rows may cause different stimulation to the lats than weighted pull-ups, I'd still smack you and say you're wrong; the chief difference will be in the synergist muscles worked. However, I would say that these two exercises would be better candidates for "hitting the lats differently" than changing something as (relative to the lats) insignificant as the grip.