Obviously if all things are equal you want someone who throws harder but you can miss bats with movement and location as well. Berrios is a prime example. If he threw 97 instead of 93 he would be slightly better. If he had better command he would be an ace. Jorge Alcala isn’t going to get better by throwing harder he will get better by improving his control. If he doesn’t he won’t be any better than he is right now.