It is called Smart Side. If you search here and on Google you can find some info about it. My understanding is that it has not been around a really long time. It is basically a sheet of OSB cut to look like T1-11. However on the outside there is some type of resin applied and then it is primed and ready for paint. The inside looks like standard OSB the outside looks as you see. From what I read on line those who use it like it, and so far I did too. It was easy to work with and the exterior feels like it will hold up well. It is designed to be used on houses as well as sheds, barns etc. It normally runs about the same price as T1-11 but I caught it on sale and saved about $11.00 a sheet which was nice.
It has a 50 year warranty, however since it has not been out that long I am not sure what type of testing they did to make those claims. And I am certain there are all kinds of stipulations, if in 30 years it falls apart, I am not expecting to get my money back or a free replacement.