You will see an improvement in drivability with a Catcher. It will add power/fuel, but not the fuel a comp gives it.
I sold my Comp and bought a catcher.
I LOVE the off idle drivability. This is the standard Catcher, the Special has less timing so you can still run a timing box like the Comp.
By doing what I did , I moved the power down the scale for towing/driving.
Would I switch back? No, never. To borrow a well known statement, " you will have to pry the Catcher from my cold dead hands" .
If I want/ need upper end power ( someday ) I'll add a fuel only box like the TST or VA.