Protestant Authority - What Is It?

What makes protestantism distinct from my catholicism or orthodoxy is an authority claim. What i would say the protestant authority would be that there are 66 books that are collected that are the inspired word of god and are the sole, infallible rule of faith. And i believe that should be unpacked more to say that. Instead of arguing there is sufficient evidence to believe the catholic authority claim, what if we ran with this kind of argument? There's more evidence for the catholics authority claim than the protestant Authority claim.