I've used both, and made longer shots with both, and find the turrets to be preferable. You actually may find the turret to be faster, even if that seems counter intuitive. Under stress, it's just easier to work with the crosshair intersection than some holdoff value. The turrets posses further advantage if you need to hold for a windage adjustment as well. Using a turret, your aim point will at least be on the horizontal crosshair. Holding windage on a BDC usually puts you somewhere out in space.
The flip side of this is that spinning turrets asks a lot more of a scope and mounting system than a reticle based solution does. I have turrets on ALL my scopes, and I've been gravitating towards more and more reliable solutions. You'll want to shoot a lot to verify your scope's behaving itself, map the adjustments at close range, and confirm the drops at longer ranges. Then again, If you want to get comfortable out to 500, more trigger time is a great first step.