It's been a while since I posted as I just got busy with life, but I am amazed by this thread.
The OP comes on asking the question "Who's the real Comiskey?" He gets an answer he doesn't like and then refuses to believe it. Hmm.
By the initial question, it seems clear to me that he sees there obvious differences between the 2 players pictured. Is there a similarity? Sure, but as Lance very clearly explained, if one difference exists then it isn't the same person.
The grouping of facts is interesting. The first five certainly do show that it is possible for Charles Comsikey to be in this picture, but those items do not prove in any way that it is in fact Comiskey pictured. The last 2 don't prove anything either. Many people thought the earth was flat until they found out it wasn't.
Am I some known picture expert? No
Can I see clearly what is laid in front of me? Yes. The OP's inability to see the difference between the straight line of Comiskey's ear and the curved line of the guy in his picture is somewhat surprising.
I've added a couple of pictures, hopefully, to help the OP out.
I added the red line to show the extra piece of ear the OP cut out in his attempt to compare ears.
Next, I added something to Mark's comparison pictures that I noticed about the inner ear shape. I added the Blue lines to show how the shape of Comiskey's inner ear arches up and back. The unknown player's inner ear tissue projects forward and downward.
Best,
Mark