Don the best style conversions IMO to KORG aren't from Yamaha, .......
I would say most Ketron & Roland G70 styles can be converted and adapted, tweaked, etc, into usability most times on Korg Arrangers. There is an abundance of Korg Styles out there from all over the world, Korg also has offered players many free Bonus styles, updates, resources for FREE over the years.