I have been thinking about picking up B3X but this is iPad only and isn’t available for phones. It looks like VB3 v2 will be available for phones which is quite important to me as my iPad will be used for controlling my digital mixer. Pretty much all the apps that I’m interested in buying to create a mobile sound module are available for the iPhone with B3X being the exception. I do prefer the sound of B3X but the Rotary in VB3 v2 is certainly a step up form the YC61.
Ideally I would prefer if Yamaha sorted out the rotary in the YC as I really like the overall Hammond sound a lot!