canada doesn't have serious problems with voter suppression, or an electoral college, so trudeau would beat o'leary pretty soundly. remember: if the united states used the same electoral system as canada, and all other things remained equal, the results of the 2016 election would have likely given hillary clinton a solid majority government. the worst case scenario would have been a very weak minority for trump that would have likely fallen before the first budget.
so, these comparisons are foolish.
the actual truth is that it's probably actually exactly what the liberals want to see in terms of an opponent. trudeau would be able to smear him as an american.