I have had the much discussed 2135TI for a couple of years and love it. I recently needed another impact and bought the QTI. I have used it a few times but havent tested it against my standard model, but they are rated for the same torque output. I was very surprised as it is much quieter than the standard model. This guy has a bunch of them right now on ebay dirt cheap http://motors.search.ebay.com/_W0QQsassZtdliquidators