The RZ screen (I guess it's the ''A-Type matte screen'') is a great improvement (in terms of brightness) compared to the older Rollei screens and they are significantly cheaper compared to the acute matte.
But the new mirror Dan installed is at least as important as the screen. With a new mirror I don't have problems using the old Rollei screens.
Brent, the Mamiya screen is very close to a Maxwell screen but ever so slightly dimmer. It's been a while since I have seen an Acute Matte screen but I would say that the Mamiya is 'in the same class' but not quite as bright again? All in all the best balance of brightness, snap in focusing, and price out there in my experience.