genos and tyros voices on the 770

[jondav]

A question, is it possible that the 770 can play voices, that originally only appear on the genos or tyros models, the reason I ask is when I download styles that are for the genos or tyros, some voices are blanked off on the OTS screen, and yet they play o.k.. furthermore  it tells me " these voices cannot be edited". I have saved quite a few of them to "user", and they certainly sound different to any preset ones on my 770.