They’re the same “power levels” across much of DC’s history in terms of character efficacy, especially when you consider Batman’s noted ability & intent to plan to take down any superhero/supevillain he’s aware of, coupled with a billionaire’s bankroll to “get things done.” His cave that houses a supercomputer, cars, jet, helicopter and arsenal aren’t trivial resources.*
* I’m somewhat surprised nobody’s done a Batman (or Iron Man) “clone” who uses his resources to finance a private army of capable individuals to be vigilantes in a broader geographical area. All of the, wearing the same costume and using the same gear. Hmmm…maybe my next superhero character…