I wouldn't want a 'leader' who can't manage his own caucus currently, to manage getting a deal done for Canada.
It's crap either way. PP has lots of experience criticising and no experience with governing. JT (and CF) have been through Trump 1.0.
Mind you, the chaos south of the border isn't likely to subside, either. The final vote in Congress to avoid their government shutdown had more Democrats voting for it than Republicans.