Partly it's the institutional nature of having committees or councils where the two sides meet to talk through issues in a way that allows them to come to a solution, but in part it's just the fact that the EU members and Canada, as advanced industrial democracies, are maybe better able to talk things through. It can be more difficult with countries that have systems that are a lot different from ours.
On May 1st, 2023. See this statement in context.