Shhh.... that's
quiz 7.
The torque analysis doesn't change; a smaller trackwidth, ceteris paribus, requires more torque to turn.
Nor does the tipping analysis. A thin bot is as likely to tip when driving up the bump as a wide robot when they have the same center of gravity relative to their geometric center. It's more likely to tip side-to-side as well, as Cuog has said.
EDIT: ether beat me to the link, but here's the analysis anyway.