They both have trips that cover multiple bases depending on the plane and base. Example LAX covers a bunch of airports on the 737 similar to NYC. The Airbus only starts/ends out of LAX.
But for now the Airbus in CLT and 737 in ORD only cover one airport but it's something you'd have to deal with when junior and not at your preferred base yet.
Keep in mind CLT is going to be forever senior. If you live there not a big deal but personally if I had a choice where to commute I would go to the junior base. I've been here four+ years and if I was still in CLT would be doing back to back red eyes...