I can't speak for the REI one as I'm also looking for a backpacking pan but the finish on GSI's Pinnicale line is fantastic! I use the dualist and soloist and frankly even if something gets burned you turn it upside down, tap it once or twice, the item falls out, then you simply wipe it with a damp paper towel. Ten seconds later it's dry. 4 years and countless dozens of uses later they still perform like new. I even cook things on my desk when I'm on the computer with them (though I'm probably needing to start buying the fuel in bulk because of it).

I'll take a look at the REI one since we finally have a store. I wonder if the finish is anything close?