I don't know think Carr is a bad comp but I think Carr is a little better at improvising while I think Mac still needs to work through things the traditional way. That may come with experience but to be honest my comp is pre-injury Chad Pennington. Not the most physically gifted but smart, accurate, and tough. I know pre injury Pennington is a small sample size but he was a really good QB before the injuries and even a solid QB after them.