They are both original '71 fenders.

The passenger side is earlier production (really early production used '70 fenders without the cutouts)

The driver's side is a later production '71 fender and the bumper & mounting plate area is the same as '72-4

I have a pair of choice, original paint '71 fenders for my ragtop project and they are the same way with the different stampings. I will probably cut & weld to make them both look the same --- I did not notice it on the yellow car until I started installing the hood bumpers & adjusters - by then it was too late.....