I just posted something similar in the poll thread but wanted to include it here as well. As far as I know, the Ty Cobb with the Cobb back a glossy card (save for one:
http://www.t206museum.com/page/cardweek_5.html).
It might be that Ted is arguing the the standard, no-gloss portrait is in the 524 and the glossy portrait is #525 because of the gloss and not because of the back.