Accuracy, distance, shot shape, trajectory, etc. is more about the shaft than the head, assuming you make a good swing. I hit both the R11 and D3 before settling on the D3. I really, really like the Mitsubishi Ahina for Titleist shaft (formerly known as Whiteboard), and obviously the R11s at the shop didn't have that shaft so it's hard to make a direct comparison. I ended up going with D3 for several reasons: really liked the way the ball felt and sounded coming off of the face, didn't like the white so much, and the launch characteristics of the shaft were better in the Ahina than whatever I was hitting in the R11.
Also good to note, the Titleist has independently adjustable loft and face angle. The R11 changes the lie angle, and their adjustment "chart" is confusing to me. Seems like if you want to add more loft to the driver, then you have to open the face and flatten the angle. Obviously I never quite comprehended how their adjustments worked, which probably contributed to me going with D3.
I've got the D3 9.5, adjusted down to 8.75 with the neutral (.5-deg open) setup. Ahina for Titleist 73 gram shaft, X-flex. It's a bomber, and I can work it to the right pretty easy. Left is a little tougher, but that's probably because I'm starting with a half-degree open face. When I set up for a big swing though (wide stance, right foot slightly open) I typically get a high, sweeping draw (and occasionally a low snapper).