This is an excellent on-line resource to look up known fakes of ancient coins. http://www.forumancientcoins.com/board/index.php?board=9.0 It is my first stop when confronted with uncertain authenticity. Having said that, both your coins look authentic to me, and both quite nice.
This is the link to the actual gallery of fake coins: http://www.forumancientcoins.com/fakes/index.php