I have a Converter Disk that came with my KN7000, details below:-
GEM.CNV
KORG.CNV
ROLAND.CNV
SOLTON.CNV
TECHNICS.CNV
GEM-WS2.CNV
I have used it to convert the Roland styles to play on the KN7000 but, not the other way around.
I know nothing about programming etc. but it would be a logical explanation as to why the Roland is happy to play the converted KN7 styles.
Audrey