You get what you pay for. Makita and Milwakee are both variable..but you gots to know whatcha doin when using those machines or you will do bad to the paint..lol.
there is skill, product, and art to polishing paint. product is easy, skill needs development and the art is feel..
oh and if you try it and mess it up..you are going to pay a premium for someone else to correct your mistake and the do it right.