Shoulder press vs laterals.
Which exercise have you seen the best progress with? Which exercise is probably more likely to give you stupid looking, gross shoulders like Phil Heath? (Synthol is not working out that well for me.)
I do presses, don't really do laterals, but there's a guy at my gym who is very slim, but has some stand out shoulders. The only free weight shoulder exercise I've seen him do is side laterals. Other than that, it's a lot of cable work and some machine work.