Thanks! It put me on the right track. After a little digging, I found that both critters were theropods. According to the Wikipedia entry, "The earliest and most primitive unambiguous theropods (or alternatively, "Eutheropoda" – 'True Theropods') are the Coelophysoidea....they may have been ancestral to all other theropods (which would make them a paraphyletic group)." https://en.wikipedia.org/wiki/Theropoda