I have the Roe, but had a chance to drive a Paxton.
The Paxton had a sweet spot around 5000 rpm, it winded up fast at that point and it felt stronger than my Roe getting to the redline. It also "felt" like it really wanted to keep going. But up to 4500 rpm it was like a stock truck.
My truck accelerates differently, the boost is more "even" all the way to the redline but it doesn't "peak" like the Paxton. There is a lot of torque, so its a little trickier to manage the bottom end without spinning the tires.
My opinion is that for everyday driving where you don't go to the top end often, the low end torque is more useful for faster acceleration at any speed or rpm range. Its also fun to be able to smoke the tires at a twitch of the foot... but the Paxton is a more "serious" setup for racing, I think.