rocker comparison

I was cleaning up the set of rockers from my 2.2 T engine that is being stroked to a 2.4 S. While 10 of the rockers were very nice, 2 had some very minor pitting I was going to polish out with some elbow grease and a couple stones. My cams are Elgin with has the equivalent of an S grind. Then fortunately I recovered the original numbered rockers that came with the cam. Laying these side by side, they are different form my T cams. Can the rocker experts help me identify the differences please? The rocker on the left is from the 71 T, rocker on the right came with the Elgin cams.

The one on the right is a late model (long foot), they also came with a “B” from a different manufacturer. Compare the length of the foot to your others.

Thanks for the response. The feet are approximately the same length...I presume these are interchangeable?

Yes they are