Consensus building? If a party in Canada gets a majority in Parliament, they can pass whatever bills they want (the senate rarely intervenes unless it's really controversial). And individual MPs have much less leeway to stray from the party line.

The US system is much more adversarial. Even if a single party gets the house, senate and presidency, there isn't much stopping individual party members from voting against the party line.

It's true consensus is need with a coalition/minority government, but they don't seem to happen that often. Yes, I know there is one right now.