I tested both and traded a Lowrider on my Tbird. The Vrod was too low and stretched out feeling for me and the Tbird fit well and seemed to handle better. Then add the lower price point and here I am. To me the Vrod seems like a drag bike and the Tbird is a cruiser which makes each in a different class.
But like said before...try one. You will be amazed how well it handles compared to a Harley.