The comparison is a little "apples and oranges" in my opinion. The VR-09 is more of a challenge to the Nord Electro/Stage at the Rolls-Royce end, and the Casio XW-P1 at the Skoda, bargain basement end. I have one on order and will use it as a lightweight, second-tier board for organ and synth duties, mainly. The inclusion of "drawbars," easy switching between modes, and reasonable sound quality at a sensible price sealed the deal for me. It will also make a handy rehearsal board.
The RD-700NX has SN piano and EP sounds, a top-quality weighted action and 88 keys. If I could manage its 55lbs, I'd love to have one. The VR-09 has SN organs (whatever that means), standard piano and EP samples, a "cheap" action and 61 keys. It weighs next to nothing. They are aimed at entirely different market segments.
Since you've had a chance to play the VR-09, I'd love to hear your opinion of its sounds.
Roland RD-64 & VR-09 | Korg SV-1 | Casio PX-5S
Kurzweil PC361 | Plugiator | VB3 | Pianoteq
VI Labs Ravenscroft
Quote of the decade: for 50 dollars you can play Chopin if you are good enough while sitting on the toilet - battery operated. (courtesy Michael_99)