So i know that many people think that Lizard-Lions think that are crocodiles since they seem similar ideas but the fact that crocodiles exist in sothoryos seems to disprove that idea. I would like to suggest that they are one in the same and are just known as different names.
"The strange creature has the head and neck of a snake, the body of a leopard, the haunches of a lion, and the feet of a hart" Wikipedia The Questing Beast now a giraffe is very similar to the description of the Questing Beast. so I suspect that lizard lions are just what those of Westeros call crocodiles