Yes, I’d look at the gyms as a whole. Which one sends the most (or any) girls to college? Which one has higher scores at the upper levels? Of course she might decide she wants to take it less seriously as she gets older, to have more time for other things, or even do something else entirely. But if she does want to reach a high level, you want to set her up on the best possible track. You can also look up gymnasts on mymeetscores to see if they came up in the program or learned their basics elsewhere.
9hrs/week seems like a lot for level 2. My daughter’s gym has that for L3 and then 12hrs for L4 (they don’t even compete L2). With those kinds of hours you’d want a lot of uptraining, but I’d be worried they’re spending tons of time polishing the L2 routines which isn’t really useful for future progression.
My 6yo DD did bronze last year, and I mainly started her in Xcel because the gym was close to our house. Honestly competitions seemed a bit extraneous at that basic of a level. In your position I’d probably go for the L2 preteam and compete L3 next year. There’s still plenty of time in L3 for her to get used to the competitive aspect (like L2, it's not a required competitive level), and then she can go into L4 ready on all fronts. But depends on the gym as a whole.