John,
Is your "spotted Koran" the one that was on BZ a while back?
I was going to purchase that fish until I remembered my previous experiences with "Spotted Korans." Used to always search shipments for "aberrant" Koran juvies. My main take away: they can start changing from 1.5-6", and the rate of change on different areas of their body can vary greatly. Furthermore, the bar/swirl patterns on the juvies can vary greatly (and are not indicative of their adult appearance).
When they are well into the change they reach a time when they are spotted, but still with the bars/swirls. Sometimes the spots break up the bars/swirls, making the bar/swirl pattern look very unique. And you will see every combination in between. The little bit of "orange" on the top fins is not uncommon, and will eventually meet up with the brown/spotted part, and ultimately change to brown. Next time you visit an importer, check out the baby Korans: they all look different. If you look hard enough, you start seeing things!
But that is just my opinion - hopefully yours will morph into something cool.