IMO, that's cleaner and more flexible. YMMV.

And also preserves the ordering of the rules, which could be important. E.g. you want to be able to shortcut processing of a record by setting a flag (a la $File::Find::prune = 1) it'd be nice to know that the rules you're trying to skip over won't get run before the pruning one just because of the hashing order.

Update: Oop, you mentioned execution order. Never mind me. %/