No, I am not going to break down their play in the first preseason game, I have something a lot more scientific.

I simulated them in Madden! Below are the highlights from a Lions team helmed by Culpepper and another one helmed by Stafford. I ran the entire season without any interaction by me. Conclusions follow:

Culpepper's Lions

5-11 season

4th place NFC North

Green Bay Wins NFC North

Pats beat Cards for the Superbowl

Culpepper: 78 QB rating/2433 yards/14tds/17ints

Kevin Jones: 884 yards/3tds

Calvin Johnson: 1217/ 8tds

Stafford's Lions

9-7 season

1st place NFC North (beat GB on tiebreaker)

Won wildcard game against Eagles

Lost Division Game to Seattle

Pats over Seattle in Superbowl

Stafford: 90 QB rating/2751 yards/ 20tds/11ints

KJ: 981 yards/ 0 tds

CJ: 1254 yards/11 tds

Well, there it is. No more arguments. Madden has spoken. Stafford should totally start as QB of your Madden franchise.