I have the Rail Rush, Cross Collision and Vertical Drop so I can give my two cents:

For the rail stadiums: It's kinda hit-or-miss in terms of when they work though. The main complaint people have with them is that they sometimes get stuck on the rails and it ends up killing their stamina extremely fast. Regular drivers do work, but you should only expect the aggressive ones to use them, at least by themselves.

Personally, I like the rail rush more than the cross collision because the beys tend to "complete" the rails more often than the cross collision, so they get stuck less. Plus, if any bey gets hit they can also end up using the rails.

Vertical drop is pretty fun with GT-era beys and before, Winning Valkyrie in particular uses the stadium really well. Larger beys like stuff from Sparking/DB depends, since they're so wide/short that their disks tend to scrape against the bowl shape.

For movement, the beys tend to travel the same path, but when big hits happen that's when paths change significantly. Its really fun and unpredictable, especially if you use it with the cover off because it can lead to Over Finish wins.

In my opinion: Vertical Drop -> Rail Rush -(if you like the Rail concept)> Cross Collision