The Pro Clip is definitely USB powered, but you will still get the light filtering issues. The response times seem very similar to me, but I have mainly used the Pro Clip. The benefits of the Pro Clip is that it attaches to you headset (an essential requirement in my house :)) and therefore you may look slightly less martianesque:smilewink: On the down side; you have an extra cable running from the headset. I have also experienced the pivot arm of the Pro Clip 'popping out' occasionally.