Yep the KB3 at least attempts to be an organ sim with drawbars, percussion and C/V. The JUNO organs are samples and that's it. The VK leslie sim is in the box though.
For the earlier JUNO-G which I have, and the related Fantoms, you can download a sound pack from rolandclan.com called B4Real. What that guy did is create a patch for each drawbar, the percussion, the leakage and the click. Then he created a performance (multi) where he assigned those patches to the individual parts. That way you can get drawbar control and switch the percussion on/off. Then he made an effects chain with EQ, amp sim and the VK Leslie sim. When I'm not bringing the Nord to a show I'll use those Hammond sounds and they work fine. The limitation is you can't get polyphonic percussion and C/V.
The Jupiter-80, Jupiter-50, FA, Integra have the Roland VK organ sim as well with proper percussion, but still no C/V AFAIK.