The pros use the low outside much more. This isn't because it's a better shot. It's because they are playing on slick, new cloth. New cloth makes it easier to keep a sliding cue ball on the stun shot and makes it harder for the spin to grab on the rolling inside shot. Watch them switch to worn cloth and they start going high inside more often as well.
noticing this a bit at current uk open
john morra had a ball vs billy thorpe that looked like an inside job to me
but he went outside with it, hit the eight ball he was trying to go around, and got a blind cut
he dogged the shot, billy stepped up and finished the rack
incidentally, billy came back in the match to level things at 8-8
john tried to thin the three ball safe on case rack
he hit it so thin that he seemed to genuinely wonder if he hit it at all
billy confirmed that he did, and they had a laugh about it
I had to rewind the match myself to see it..what a touch