The big difference in the ROE and the Paxton (in a nutshell, and for hooking up purposes) I would dare to say that the Paxton is easier to hook out of the hole.
How much "better" is up there... Hell the RC hardly hooks all motor...let alone with ANY forced induction...without reference to traction.
Case in point... the ROE peaks HP/TQ @ 2600 rpm respectively. The Paxton later in the RPM curve (4200RPM?) so your laying "less" to the pavement from a dig with the Paxton over the ROE.... therefore hooking better with the Paxton.
On the dragstrip however present's a slightly different situation... with the above rules still in effect...
One of many "Theory's" out there (not taking into consideration the multiple other variables)
"when" you get traction with a twinscrew or centrifugal... the "idea" is that the Twinscrew (because peak HP/TQ come on earlier in the RPM cycle.. it's going to get up and out earlier... leaving the centrifugal type SC to "catch up", and have to run you down.
Time will tell, and we have plenty of other drivers that got the seat time to tell you better differences and pro's/con's.
Here is a vague site regarding the different SC's, and not intended to belittle you regarding the mechanics of how SC's work.
http://www.superchargersonline.com/content.asp?id=5
Regarding the exhaust side of thing's, I have the Bellanger header's and mid's with one set of HF cat's... then through a Magnaflow. The Magnaflow has the two 2 1/2" flanges cut off, and the entire system is 3". Not sure I would run the ROE with stock cat's, and you could probably get away with stock exhaust manifolds, but open up the rest of the system. At a minimum change out the mids (delete rear cat's, or total cat delete) and a cat back.
Nowhat
had been running his Paxton successfully with the stocker exhaust manifolds.