I own both AIO and DACP. Both are great products and would not be afraid by any means to use them on cars that need them or recommend the 2 products to people. Like most of Meguiar's polishes, paint cleaners and compounds, they all have diminishing abrasives as mentioned above by Gonzo. Meaning, as you work DACP into the finish, it breaks down it's abrasives as the paint becomes more defect free. I've used DACP with a PC on speed 5 and a polishing pad with no problem! However, this is the most aggressive product I would use with a PC. Anything more abrasive, I would want to use a rotary to gain the benefit of.
AIO, like DACP is also a great product. Just don't use too much of it like I did when I first tried it on my truck. Hard to buff off, the results weren't that much better and the truck only looked as if it was only washed and QD'd Thinner is better with AIO. Does that rule apply to DACP?? IMO, in a sense it does but still, why waste the 2 products. Just my $.02,,,,,,91