Here is the article on the E91 sets I posted on here several years back.
https://net54baseball.com/showthread.php?t=243920
Pretty much all of the E91A set based the artwork of the depicted player's head on photos also used in other baseball card sets. About 1/2 of the E91B cards (the repeat players) also accurately depict the player's head. Unfortunately the E91C has all different players for this same artwork, so no cards in the E91C accurately depict the player.
Still a neat, colorful 110+ year group of cards...enjoy the hunt for the rest!
Brian