the items with yellow stars are custom wearables that were released before the CW system changes, the green stars are items that were released after the changes!
they updated the whole UI, made it easier and cheaper to submit items, added categories, lowered prices on most things, etc.!! just a lot of quality of life changes that were majorly needed
If you're interested in the specifics, you can check out the Transition Guide part of the CW directory :)