Welcome to iMore!
Which do you like best? My suggestion is to go to an Apple Store and compare them side by side. Letting others decide for you may not be a good decision as others do not know your likes and dislikes. You could end up making a choice you regret down the road. As for storage size, if you can afford the 128GB, I would suggest that. Never hurts to have more storage than needed. It hurts to have to manage not enough storage all the time.