The RP outrigger has 3 pieces, is long, and will flex and vibrate much more easily vs the Nova. If the middle piece could be removed it would help a lot, but that would require a bushing to maintain height. Dont think it would be difficult to make the bushing, and it may require a longer bolt in that pivot point.
With the Galaxi, for smaller bowls I rotate the head off ~20 deg and use the banjo. For larger bowls I rotate the head ~ 135 deg and use the outrigger. This type of alignment would allow using the RP outrigger w/o the middle piece and a bushing in place.
I also like the movable control pendant on the RP. I have the Nova remote, and it worked for a little while but no longer - I suspect they had a lot of issues with it since it has been discontinued. The pendant would be nice but not reason for me to change lathes.
Appears the RP Envoy has a 3 step pulley, but a min speed of 250 rpm. That is deal beaker for me. Too fast to start up for a large outboard blank. I also sand on the lathe and use the lathe for part of my finishing process, and 250 rpm is too fast for larger work. The Nova Galaxi/Saturn go down to 100 rpm.