I have built and flown a DP Ultimate, and have flown a smaller size Pitts. Overall, I would say Definitely go with the Ultimate.

The Ultimate ARF is an awesome work of art. It built very easily, the wings came joined, the cabane set up, everything was set up, all you have to do was assemble the tail, and install your gear! it couldnt be easier. The quality of the model was tops, VERY light!
I have a YS 120NC in mine, Will do tight Knife edge loops, awesome torque rolls, and has unlimited vertical. The huge rudder area is great for aerobatics!
I will soon be doing a construction/review post on RCU about the plane.
Good Luck