Below left is the image from the pinback, below right is Honus from the 1903 Breisch-Williams card. Da.veGr.ob has suggested use of a grid, and I think this is a good application for it. It makes the difference in ear size and shape very obvious (outlined in red). That’s enough, but it’s useful to point out a few more things.
The grid also makes it easy to compare hairlines (blue rectangles). It’s easy to see how far back the hair goes at the part. The hairline for the guy on the pinback is noticeably farther back. The grid also makes Honus’s wider jaw (on the lower left) very evident. We don’t need the grid to see that the pinback guy had a somewhat turned up nose while Wagner had an bulbous nose tip that was not at all turned up.