Hi DNJ

There is no vocal processor in the Wing, (Although if demand was there it could be added) as most users ignored the vocal processor on OAS 7 instruments in favour of the TC Helicon system.

The exception was the US, where artists appeared to like the Wersi one. (Alter hearing it I am not sure why though)

The Wing has a totally different keyboard OS to OAS 7 instruments (Although the main sound engine remains the same, as does style compatibility) and so is not as open or as flexible as OAS 7 instruments are, (Hence the price gap) but it is still fully upgradable, with new features, sound packs/styles and VST being added all the time. (Sound/Style packs and VST are obviously cost options, just like the premium packs are for Yamaha keyboards)

Hope this helps

Bill