Does it matter which Retin A (retinoid) I use for acne?
You are so welcome! All the retinoids you mention will work about the same so it’s really about the base. The Renova or Refissa will be the most moisturizing (for dryer skin), the Retin A – micro more for oilier skin types. The generics really depend on the base the active is put in. Generally, they are cheaper and in a mid-weight base or slightly drying. More on retinoids.
There are some non-prescription Retinols that are good quality, not quite as strong as the prescription versions and somewhat less irritating.