My two cents is that the biggest differences come from which team you are on within the club, and I don't mean the A vs. the B vs. the rest, but which coach you have, the other girls and their dynamic, and the parents as well. If you get a coach whose style doesn't work for your player or your family values then it's not a good fit. If you get girls who are cliqueish then your player will not be happy. As for the parents, you will be spending a lot of weekends with these people so you better be able to picture that without cringing.
When we were looking, I asked around, talked to as many other girls lax parents as I could to find out what they'd heard and seen.
The downside is all the different tryout dates and of course the fees. That's why I recommend asking around to narrow down your options. | 
