One-and-done facial fat transfer approach vs. one fat transfer and touch up?

With a fat transfer to the face, some doctors go with the one and done approach and do one somewhat aggressive fat transfer with the idea that they will not have to do another "touch up" fat transfer in the future. Other doctors seem to like to do a less aggressive fat transfer the first time and then do a second "touch up" fat transfer anywhere from 3 mths to a year afterward (depending on the dr). Which approach is better?