They aren't fair apart at all in rareity. But, because of demand Princess Minnie is slightly rarer. I once tried for minnie with red baseball cap, and something little, but no one accepted. Minnie is just more in demand, rather than the baseball cap.
Ehh, the princess minnie and red baseball cap are about even. They're both in high demands. And were both a little more difficult to get. Red baseball cap was a quest item. Princess Minnie was sold for a week in the early VMK days - I believe.
Minnie would be high in demand and harder to get - so Minnie. :cgrin: