Another difference in the 2 Carson City Nugget $5's is a difference in the inlays. Note that the older H&C(CJ) version has a white ring around the edge of the center inlay. The newer H&C version does not have the white ring.

Last time I checked, there's quite a difference in prices, with the older "white ring" being more expensive, and harder to find.

P.S. --- You're asking the right questions. Keep it up!