My money would be on the V-rod. I dragged a guy from a rolling stop once. He had a "built motor" i just played with him staying a half a bike length ahead the whole time.

I have had 3 V-Rods 2 built and a Destroyer and 5-6 built CVO twin cams.
IN MY EXPERIENCE--the V-rod will eat up a built twin cam every time.
It is important to remember that the rev limiter kicks in at 5250 rpm on stock Twin Cams and possibly 6250 for those who live on the edge. The V-Rod has a 9250 stock rev limiter and can be upped to over 10000 if the motor is built.
So a built twin will be shifting thru the gears to take advantage of the optimum torque on the edge of the rev limiter and the V-Rod still has 4 grand to go stock in each gear and 5 grand or so in a built V-Rod.
A "roll on" race from 2nd - 6th gear for the twin and 5th gear for the V-Rod would be the best test up to say 100mph for safety reasons.
In the past, I have occasionally raced built twins with my built V-Rod from a standing start and they don't have a chance out of the hole either. (built vs built)
I happen to like both V-Rods (old version) and CVO Street Glides my current and favorite ride in my senior years
Both bikes are purpose built and work very well for their intended purpose.
Jerry