I would agree. To the extend that OP's thesis is true (which I don't think is fully true, but also not fully wrong either), I also find that the readiness to compromise both at the EU level and in most member-state parliaments that eventually need to transpose the directives into national laws, is a difference that stands out.

A multi-party system helps too, because there can be situational alliances that do not divide the parties internally. E.g. in one topic the Social Democrats, the Moderate Right and the Liberals can be on the same side and pass something (probably a free-trade deal) and on another topic the Social Democrats, the Greens, and the Left can pass something else (probably an environmental regulation). When there are only two parties in the legislature, such alliances break party lines, so it's a higher hurdle to overcome.