In theory the Canadian Grand Prix should be a Mercedes silverwash all the way. Similar to Italy's Monza, the Circuit Gilles Villeneuve in Montreal is basically a sequence of flat-out blasts punctuated by chicanes, so he who hath the best engine in Formula 1 should prosper here.
Despite the best efforts of Ferrari, Renault and Honda, which have all recently updated their power units, that best F1 engine still belongs unequivocally to Mercedes.
There are nevertheless some trade-offs. The long straights make this a low-downforce circuit, but any downforce you can retain will help significantly in those heavy braking zones, and the more energy you can generate here should help make what remain quite hard tyre compounds work better on one of F1's smoother track surfaces.