The first one is really lacking contrast, it could use some darker darks and whiter highlights. Great form and shape though.
The second is over saturated. If you want to my advice with PS, it's subtlety subtlety subtlety. Be precise and edit the details. Don't just flip the bars from 0 to 100 for the whole picture. Cool stuff, though, the dino really looks alive.
"The most incomprehensible thing about the world is that it is comprehensible." — Einstein
