I think, that is very different, because Koetsu's can sound different in different Systems. 2 friends of mine , one owns a Koestsu Onyx, he loves it, but was totally shocked about the improvement in his System when he got a Shelter 901 (the Onyx will go on sale), the other one had a Koetsu Jade, sold it, still has a Rosewood Sign. Platin, never uses it, because he prefers a Zyx and some others he owns more.
I think, when you want the Koesu "Sound", buy one.
I think, when you want the Koesu "Sound", buy one.