All three will have a 'filling' effect,because they are oil based.Of the three grades,the Cleaner fluid will have the most 'filling' effect,as it is only really designed to clean the paint,and prepare it for wax,or a fresh coat of wax as part of the six monthly schedule.
Cleaner fluid Medium,and Cleaner fluid Strong,both contain 'micro' abrasives that break down as the product is worked in,so unlike comparable products from competitors,these two grades of cleaner fluid are capable of removing swirls etc,by hand or,at slow speed by DA/rotary.