Its a synergy between the style and the sampled sounds with Yamaha Diki, you would understand that. Unless you are using actual mega voice patches, well then no, OMB will not magically do that for you. Of course I am no expert and I am only passing on my experience, so perhaps "power" users can advise you better.
I used it with both the ES and XS racks and when I used the presets on both modules I got it to sound reasonable, but as a "whole" the styles generated from OMB and played via the racks were nothing like the same styles played on and actual Tyros 2 for example.
And anything newer that psr 1500 (well maybe 2100) was too glitchy for me, left unedited that is. I found when I stripped out a lot of the controller info, and reduced some instruments I got to where the results could be called acceptable for live use.
And in my view, way too awkward to use in real terms..
But I have to admit Jos has done a great job with the new interface and it looks MUCH easier and intuitive.
As I said perhaps the new version has some new bells and whistles..I have already asked Jos about a purchase. I DO like having fiddly bits around
