Yes, they should work for you just as well as our “roll-your-own” variety. The Quaverato circuit is actually pretty forgiving with what optocouplers you use, unlike the VPM-1 (which is our mod for the Ernie Ball VP Jr.).
We originally didn’t use Vactrols in production because they are hard to source these days. We ended up developing a procedure for testing LDRs that gives us good results and now i prefer our selection process over the ready-made optos.
-Brach