AIO is best applied with a polishing pad. If you have to do a car with bad oxidation like the Honda I did last week, you will need a more aggressive pad for the job. I used a yellow Propel cutting pad. I used it mostly on speed 5, but also on 6. For a typical car, AIO would be OK to apply on speed 3 or so.
I have never used SG, but I would apply it with a finishing pad on a low speed.