Being a previous owner of both Korg & Roland. I have like yourself used other boards converted styles including Yamaha Styles and was disappointed.
Now I own a Yamaha 9000Pro I found that I previously totally misjudged the quality of the Yamaha Styles. I am afraid in most cases they just do not convert well to be played on other boards.
Most converted styles do not display the quality compared to when played on the board they were made for.

Graham UK