Hi Ian and Spalding
You say just substitute the same instrument in the style, (Such as an Acoustic Nylon Guitar) which is fine in a closed keyboard as you have a very limited number to choose from, but you can have 100s to choose from in the MS, so what chance is there that an MS owner would choose one that you would think would be ideal for the job, and if he didn’t, then no matter how good the sound, your still going to prefer the original.

If on the other hand you have an MS in front of you, and you can’t find any suitable sound to replace the original (Highly unlikely) then yes, for you the MS would have failed to live up to its claims.

Probably the best way to go about it is choose 1 or 2 of the factory styles for the MS owner to use, (Difficult with Korg as manufactures styles are difficult to get hold of) then let him do his job.
When the style is posted, say what sounds need changing or adjusting so that the MS owner can tune the style to your preferences. Eventually after a few postings you will have a style that suits you, and it would also show what you could achieve if you had a MS.

Just posting styles Willy nilly doesn’t work I’m afraid. (One man’s meat is another mans poison)

It would also help if a sound demo of the original style could be posted, along with the variations, chords used etc., to make it easier for the MS owner to compare. (It would also make a 1 – 1 comparison easier)

Bill