Here are scans of Gehrig 92 & 160 and Foxx 29 & 154, other than the slight shading differences, I don't see anything different. It does seem the Gehrig 92 is usually darker than the Gehrig 160...but I have not noticed that general difference in the Foxx cards. Possible (but not sure, could just be the one card ... note, edited to add a second 154), the 154 Foxx has a slightly bigger image than the 29. What other differences do you see with the Foxx card that I am missing?