Paintshop edit. I can't see much difference in the splines but the shaft tip is different.
To get a better idea, clean shafts and measure several points with calipers.
They are not mine, if they were, most definitely, I would clean and actually measure them! In one of the posts above , it looks like they made an 1 1/4 10 spline, so, that may be the one that the shaft tip looks bigger on.
