IPA / panel wipe and AG Cleanser are different things and have different uses.
If you're using the SRP then dont use an IPA after, as SRP contains fillers to mask defects.
If you are using a polishing compound with no fillers, then use panel wipe / IPA afterwards to remove any polishing oils and any remaining polish residue before you apply a wax or sealant.
AG Cleanser is like a pre-sealant or pre-wax cleaner, and has a small amount of abrasives in it to help remove some minor swirls etc, and also pull any crud out of the paint.
When talking about using an IPA wipe down, its only really needed if you're using a polish only, products like Scholl Concepts, Mezerna, 3M etc etc - polishes that break down and need removing before applying waxes or sealants
Hope this helps!
Bertie