All these products are very good products. One of the most important factors when it comes to any surface wether it is concrete, stamped concrete, concrete pavers, Kooldeck (or Kooldeck like) or stone is the company installing the product. Sundeck is a good product but there are other thin coatings just as good. Do not know much about stamped concrete but I know they can put grit in the clear coat finish. I would think that the stamped concrete would be hotter than Kooldeck (or Kooldeck like) or concrete pavers. Hope this helps.
www.sundek.com
www.peacockpavers.com
www.gothicstone.com
www.artcrete.com
www.multicoat.com

