The rev is the same. I was in top 10 on the app store for a good while it didn't do much to my sales so the benefits unless Apple decides to promote you for OSX are more or less null. At least in my experience.

I realized that for the kind of niche productivity software I made Google is a much better app store.

I mostly live of organic traffic and only do actual marketing once in a while. The best is when the product gets exposed to communities who are into productivity.