I'd go with AU. Having just looked at the other one which I also pegged at XF45 the biggest difference to me is the obverse. Hair, ear and tie detail aren't as strong. Wheat lines not quite as sharp either.
look in the fields where the color changes as it nears letters and devices, just a tad of change, not much wear or discoloration shows, and on well struck coins, the hair full at the temple and the wheat kernals should be crisp