Yes, probably better. The rest of the industry typically uses white bead foam insulation board. The same thickness of Blue Dow foam has more than 25% greater strength and insulation than the white bead foam. It would take a 2" thick piece of white bead foam to match Dow's superior characteristics with a 1 ½" thickness. Few people are aware that white bead foam will "absorb" moisture, while the Blue Dow will not. The white bead foam actually gains weight with time. Why don't more manufacturers use Blue Dow? The answer is simple; it cost more, and customers can't visually see the feature. At NuWa, you can trust us to give you what you need, even if it cost a little more.
It's worth mentioning here that NuWa also uses an expensive high tech foil wrap insulation (originally developed for NASA) which covers the roof, floor, front and back caps, glide rooms, and underbelly / frame. This amazing material is a reflective barrier that rejects heat/cold outward and retains heat/cold inward.
Watch the Sidewall Strength Test video for an interesting comparison between Blue Dow Foam and standard white bead foam.
This question is also available for viewing online at http://www.nuwa.com/faqs/questions/16/