I had a similar experience. I did my AFF at a very well known huge DZ (Empuriabrava, in spain) which was at 3-4h form home, so faaar away.
My surprise once there was when my instructor asked me why I went there when I had a DZ at less than 1h from home. I didn't know anything about it.
It was cheaper and much smaller; in fact they opened just 6 month before. Well after my AFF I went to the closest DZ to jump and it was awesome. They were all like family and the “bosses” were 4 highly experimented instructors from empuria that decided to start their own DZ. It’s true that they only have 1 pilatus and there’s a shortage of rigs to rent when there are AFFs but I love that place.
Cool and familiar environment, nice people, awesome views and they even ask you and encourage you to jump every time there’s a slot in the plane (which is almost every plane). So a normal day I can easily jump 5 times and it’s me that says “no more for today”. I did also my A license there and I’m still very happy. One thing I like also is that they are not “rules freaks”. Once they know you and they know your performance, they help you a lot and encourage you to try new things. For example, with 30 jumps, they allowed me to jump on a windy day when in empuria they would put a 100 jump limit and fuck you. That doesn’t mean that they were irresponsible, because before the jump, they told me everything I needed to know to land safely on those conditions and they were constantly watching me and giving me advice. They care about you and about your learning. I think I’ve learnt much more in this DZ that what I would have learnt in Empuria.
I’m waiting for winter season as they jump with snow as well (it’s at the mountains).
My opinion would be: Investigate more about the DZ B, find out who are the instructors and visit it to get a picture of how everything works there. Maybe you’ll find out that it’s a better place to jump than the big and famous DZ A.