I’ve never really noticed a huge difference with the Dell XPS models we use at my work. There’s a developer edition of that laptop that ships with Ubuntu, though, so they might have more optimizations than some manufacturers.
I think most people would recommend getting a laptop that has manufacturer support for Linux, which includes dedicated Linux laptop companies (like System76) but also certain Dell and Lenovo models. (There’s several others too. Those are just the ones I know off the top of my head.)