I tried a few things that might help.
I found a shot of the side of Cobb's face and tilted it to put it side by side with Jim's photo at a similar angle (Jim's is on th left); I also made Jim's photo into black and white and darkened it up. I then took the same image and covered the bottom of Cobb's face on the guaranteed Cobb image to help the comparison. It looks like Cobb to me.
Another clue that nobody is discussed is the guy on deck. I looked at 1925 box scores on baseball reference (
http://www.baseball-reference.com/te...e-scores.shtml) and it looks like Harry Heilman hit behind Cobb frequently that year. I also posted Jim's photo of the on deck hitter. Does anyone recognize him? Obviously the guy hitting behind Cobb in spring training might not be the guy who hit behind him during the season.