Jeep wrangler vs ford mustang?
You are talking about .5 second here, not much time....any thing could easily make up that difference.
Say "one thousand one" and you have spent a second. By the time you move your foot, it could be a second...and your advantage is lost.
Besides, a Wrangler is not designed for racing. Why take the chance on ruining a nice off road vehicle, by racing someone? Challenge him to an off road race, and then see who wins...LOL.
Like someone else mentioned, the 6.7 your 0 -60 times are not realistic in real life....too many variables to consider. Even tire pressure can make the difference.
Take if Off road, that is what it is designed for.