I prefer XMT 360 as it works faster and IMHO does more correction than poliseal. But the protection from 360 won't last as long as poliseal and 360 is a more expensive product (too expensive when considering the number of AIO's on the market).
I did an AIO using both products on a silver Tundra this year. The glow from the 360 was so much more noticeable that I had to go back and redo the sections that I used poliseal on.