The Yamaha PSR-S series is a different arranger line with some Tyros features missing, while some new ones added to the S970, since it came out after the Tyros 5. Being not too familiar with the S970, I would guess that there would be some issues with some registrations since there are platform differences.

Copied S970 styles should convert/transfer fine to the Genos, as well previous Yamaha styles. Same compatibility issues with S970 Premium Expansion packs or maybe Audio Styles, as they would not be compatible with the TOTL (Top-Of-The-Line) arrangers, nor available as free upgraded packs.

Most likely the new S990 MOTL (Middle-Of-The-Line)replacement would allow full compatibility of the previous S970 custom work, data and files.

Regardless of series line or brand, I always say, "you get what what you pay for" or should at least expect what you pay for.

Marcus