I put much more emphasis on how the obverse looks in the album since that is what is viewed most often, so I would not put too much weight on the reverse appearance (unless it is really lacking in eye appeal). Looking at those 2 I think I would go with the 1820 because it seems to have a bit more detail to it...but like somebody said one of them may look more similar to the surrounding coins in your 7070, thus I would go with the one that looks the most like its neghboring coins in your album.