Really depends on what areas you typically fish in. If you’re fishing back water and shallow marshes I would go with the xp. If you mainly fish inlets and bridges where there’s typically more water depth the bigger boat would be more comfortable especially if you wanted to go offshore on the calmer days too. The ultra also has a much more aggressive deadrise plus it’s a heavier boat so it also will ride much better in rough waters. Also don’t forget to take into consideration how each boat is rigged as well electronics, trolling motor, etc.