I just did the iron test and while the one I think is wool just flattened, the other became quite stiff but it didn't melt. When I did burn the poly, I didn't get any dripping blobs but there didn't seem to be any residue. I am quite sure now which is which but I might take a sample of each to my favourite local quilt store and ask them if they can tell. I will never "unlabel" batting again.