Well I look up the prices of the valve. There is a price differance. The sniper valve part no. 16138-snos sells for 34.96 and the high flow valve part no. 16140nos sells for 72.07

So there is something going on with the valves but like you stated I wouldnt see the valve making that much of a differance on just a 125 shot. Now something like a 300 shot then yes I would say the valve would make a huge differeance.