Trevor, I'll echo Leon and say it is great seeing you posting again!
On a side note, as many know (or maybe not) there were two versions of the 1907 Tigers Dietche postcards. The difference has nothing to do with the front image but has to do with the size of the bio information on back. The VAST majority of 1907's have a very small and compacted version of the text, but there is a much tougher version with larger lettering.
Getting to the point, Trevor brought up the Cobb fielding and I haven't checked but is it possible that the fielding Cobb has the larger text and the batting Cobb (the more common one) has the small text? Just a thought and again I haven't done any legwork on the answer as there has been no time as of late as my wife just had our second child on Monday and that is basically my full time job of late!
Here are the 2 versions of Charlie O'Leary from the 1907 set, the one on top is (from my experience) many times tougher than the lower one.
-Rhett