You know, I have both as well. It's hard to say. If you want more practical go with the RS. The VX for me (less than two weeks) has been the most unreliable vehicles I have owned (including my Acura NSX which has about 8500 vehicles here in the US).
You will have issues with the windows (inevitable), the abs (inevitable), the check engine (inevitable)....and likely the TOC, and the pulleys, and the intake gaskets, and the door handles which break easy, and the rear axle seals that leak and cost a fortune...and on and on.... Are you getting the idea? I bought this knowing maitenance cost wouldn't matter because I wanted a vehicle that was unlike any other, and very rare.
If you are one of those that doesn't mind unplugging lights to make the ABS and Check Engine lights go away, you'll be fine. If you can afford to throw a few THOUSAND on maitenance probably every 2 years after driving minimal mileage, go for it.
The RS lacks the cool factor that you might get from OTHERS, but taking the top off has its appeal, and its cheaper to own.......and more boring. The VX feels like a sports car SUV..just don't throw it into a ditch like me.
Good luck !