Of the "Off the rack" standard beers and overall preferences, Canadian brews are stronger. I'm comparing Lagers to Lagers, as that is the most popular of the beer varieties for general consumption.

There are lots of craft beers up here too that are fortified, ice beers, etc...

The comment is primarily satirical, however, since pedantry has entered the chat, the 3 most popular beers in the USA have on average .6%ABV less than the top 3 selling Canadian brands.

Stronger is also in reference to taste profile, as Canadian lagers are characterised as having a stronger taste, with an overall hoppier profile than their southern counterparts.