It's generally accepted that a light roasted coffee retains more caffeine, however, that is because the light roasted coffee is more dense - retaining more of the oils that contain the caffeine. The catch though, in making the same coffee with a dark roasted bean, you'd actually use more coffee by volume to obtain the same grounded coffee by weight, and so the caffeine content ends up being the same, unless your measuring by volume, then the light roast does have more caffeine.
Surprised?
Surprised?
