You can get just as good results by simply splitting the mono signal. Geddy splits his mono signal 3 ways. I split mine 4 ways. By running amps and or effects parallel instead of series you can blend different sounds together.
None of my Rics have Ric-o-sound. But if I were to use it I would run the neck pickup into a claen amp with a good low end, and I would run the bridge pickup into a dirty amp for a distorted mid and high end.
But having to bring 2 amps can be cumbersome. So I run parallel effects and blend that into one signal and one amp.