Arbaz...As you state the Korg's have upto 6 Chord Variation Patterns within their Styles on each of the 4 variation arrangements giving them nice small variation rift's depending on the chord played. Most Korg Styles appear to use 3 chord variations Major,Minor,& 7th.
Unless a player has owned a Korg they just can not realise the quality of the Korg Styles. Even converted Korg Styles to Yamaha only produces the main Major part of the style because Yamaha models have no facility to recognise the other chord variations.
My present Roland EM2000 can be programmed to give 3 chord variations all within one style variation. Major, Minor & 7th.

Graham UK