Hi Reed, I copied this from the link provided, go there and you should find some good information. Hope this helps
T1-11 siding comes in two major grades, plywood and OSB (or oriented stand board). The plywood product is a little more expensive, but is a far superior product to the OSB variety because of its greater durability and expanded finishing options. Plywood T1-11, also known simply as plywood siding, can be stained if you're looking for a more natural wood look, or it can be primed and painted as well. On top of that, plywood siding can also be purchased in sanded or rough hewn varieties, although choosing between these two surfaces is purely an aesthetic choice.
This message was edited 2 times. Last update was at 07/19/2014 02:31 AM EDT