I'm digging my impact, its got loads of torque at low volts so that even I can whip with it and vibrates so little if it didn't make a bit of noise my nerve damaged hands wouldn't know it was on. Can't compare it to Ray's flagship Vivace as I don't have one but its much smoother than the Bishop I had and my original Neotat although the latter isn't really a fair comparison as they aren't in the same price bracket. If Ray ever sends me my Vivace I'd happily do a head to head comparison.