Our Monaco came with the permanent mounted sani-con system, and also with a techma macerating toilet.
I will never ever ever go back to a conventional slinky.
One thing though, I kinda think they are a pair. With the techma, all solids are ground up and mixed with water before landing in the black tank. And then the sanicon pumps it out. Fast, simple, clean. The exiting waste doesn't even smell bad...
I did have to rebuild the sanicon pump once, it was no where near as ugly a job as I feared it would be, and the pump works much better with the new impeller.