ESB vs ROTJ Shoulder Skulls - Differences / Any Artwork???

[bounty treasure]

(Apologize if this has been done before, but did a variety or searching, to no avail...)

Does anyone have clear artwork of either or both of these that they could post, to see the real difference(s)?

Thanks Much

 

[VashDstampede]

Here's a small sample but you can see the difference.
Courtesy of Ego

Thanks for hosting the pic secol

Ely