It seems that the number of versions and editions to many of Bruckner's symphonies can be the source of growing confusion. Unfortunately, the problem is only going to get worse in the short term as the New Bruckner Edition gradually gets published. Hopefully, in the end, this New Edition with achieve dominance and help to de-clutter the field of so many earlier and musicologically inaccurate editions..
Meanwhile, here is a quick guide to help the casual listener identify some of the biggest variations.