I personally use the same name everywhere. I'm a big believer in building a consistent brand, so I want people to recognize me no matter which site they find me on. If someone discovers me through a clip site, I want it to be easy for them to find my cam page, socials, or other stores.
As for which sites are best, there's really no one-size-fits-all answer. Different platforms seem to perform differently for different models, sometimes for no obvious reason. What works amazingly for one creator might be mediocre for another.
My advice is to try a few of them, upload consistently for a while, and see where your content gets the best response. Then focus more of your time and energy on the sites that are working for you.