I have had both applications. I much prefer the Paxton. The boost on the Roe does come in full down low - too low. It's fun but traction, without drag radials, is almost impossible. The Paxton surges after about 3000 RPM like a high performance aircraft. It keeps surging all the way to redline. I can mainatin traction with less driver input with the Paxton. On the other hand, the appearance of the Roe sitting on top of the engine is a thing of beauty. Bottom line - if you have a Gen III with a Paxton, PS2's at the proper air pressure; you launch at the right RPM and shift properly, you should be able to blow the doors off the new ZR1. If you have a Gen IV with filters and Belanger headers, etc, the same result should occur. The new ZR1 is about the same weight as the Viper.