I think the difference in qb really comes after 10 but its all about opinion. Even though Im not a Romo fan I still see him as quite a better qb than Tannehill at this point. He had a sick sub 2 interception percentage this year and a TD ratio of 3 to 1.
Tony Romo is a good QB. As I see it, he has one problem: the Cowboys defense.
I guess you can call him a choker but people forget he actually has 20 4th quarter comebacks and 23 game winning drives in his career.