Engineered can usually be sanded and refinished a couple of times - it's a layer of real hardwood after all.
No, in the case of 834 its a thin layer of hardwood veneer over plywood. I looked at the sample and laughed. I wish I should show you a cross section, but trust me you can't sand/refinish these floors. CHEAP CHEAP CHEAP
I could talk about many other examples, but everything in the 834 is the cheapest quality they could buy