I think it would largely be a matter of the appeal of the drawbar organ function (and perhaps also the VA synth, particularly with the iPad app... though if you have an iPad, there are numerous nice, cheap VA apps you can run on it which you could drive from your Juno Stage too). Other than that, I'm not sure what its to be gained, and from the sound of it, the Stage seems more flexible overall, and it sounds like it may have the better feeling action, besides.
Yeah it's mainly the drawbar organ engine that's tempting me...I'm currently driving an ipad from my Stage and running garage band for my organ sounds, and I'd quite like to phase that out for simplicity, and also to add real drawbars. But I really like the action on the Juno-stage and the ability to split / layer more than 2 sounds...I'd possibly miss the arpeggiator as well. Meh...I'll wait to play the VR-09 and then go with my gut. Thanks for the input.