Well, I have the Dillon. They only give a one year warranty on the electrical components, so if the RCBS has a lifetime warranty on their motor, I'd go that route. I doubt that the Dillon would give you any serious problems though. Mine hasn't.
I had a cheapie that i bought at a gun show for $20.00, looked like a Midway or one of those types. It worked well for about 5 years when the bowl just up and headed south. Snapped right off. Oh well. At a cost of $4.00 a year, I guess I got my money's worth.
Paul B.