If you get a big Pitts, like Exclusiv Modelbau's 48%'er (or some big %) it will fly beautifully.

Since it's such a short coupled plane, anything below 33% would be a handful unless built perfectly and very lightly.

In terms of how one flies to the other, I would think the Ultimate would fly more like a typical monoplane and the Pitts flies more like what it is, a little bipe.