They are both on the mainland.
And yes, Canadians get hassled even more going south than Americans get hassled going north. "Homeland security" and all that. The "DWI" thing, stupid as it is, has been an aspect of criminal Canada Immigration activity for decades.
Note: when you cross the border into Canada, two different bureaucracies hassle you. One is called "Canada Customs" and pretends to be in a position to forbid you from bringing goods across the border, and the other is called "Canada Immigration" and pretends to be in a position to deny entry to persons themselves for various fraudulent reasons (e.g. "I see here you had a DWI in the 70's, tsk tsk").