You really just need to sign up and try them. Things will be come apparent after a week or two.
I've been a member of several 24-hr fits across two states and even in the same city and gym chain, things aren't the same. It's a business decision based on regional competition and attendance.
For the record, I have yet to find a disappointing "24 hr Super Sport" period. That usually implies a pool and hot tub. But, if you equip a regular "Sport" with a pool/spa, the dampness causes noticeable maintenance problems unless they run the air conditioning to dehumidify. Damp smell everywhere and the locker room looks...unfortunate.
Recently moved to the LA area, I am closest to an LA fitness, but I have so many problems with them and Golds, it's a non-starter.
On the other hand, a new 24hr fit sport opened up in the area and at 5pm, it is so crowded there's a mob of people standing in the center of it waiting to get on a machine, passing time with their smartphones. Sigh, back to the supersport that's 8 miles away.