Have you gone to the store to try them on? My reason being that they all have different straps, which might affect the way you carry the bag and the comfort felt while carrying them. They also have different opening mechanisms, which may impact your daily use (clasp vs zip) and different interior capacities, dividers and pockets.
If you haven’t had the time to swing by the boutiques to try them on in order to get a feel for them, then you might be purely purchasing them based on aesthetics.