I have owned both and cannot or will not speak ill of either. I doubt that in use, you would be able to tell the difference. I will say that the Volts will give you more options on barrel features and options. I guess on the two you have listed, the Volts would be the logical choice. Last week I installed a KIDD for a friend and it's a tack driver. .....witch is better Green mountain, or Volquartsen?