Just as a note: you can, technically, have different catches for toughness / recovery. But the rebate you get is only for things that would apply to both catches.
For example, if your toughness power can only be pierced by, say, high powered weaponry (defined as anything with weapon rating 3 or more), and your recovery power will heal you from all wounds save those caused by ice/cold, then the catch rebate is probably a +1*: to bypass your defensive powers basically requires ice magic, as nothing else ice/cold based is going to meet the required weapon rating.
_____
* Possibly plus another one for researchability. Maybe +2 if it's totally obvious - a lava monster with a thick rocky skin might justify a +2 for researchability for the example catch.