Bronze-die spaghetti is worth the extra dollar.
Yes, it matters, and the difference is not subtle once you know what to look for.
Bronze-die spaghetti has a rough, porous surface. When the dough is forced through a bronze die (basically a brass mold), the metal naturally leaves tiny scratches and imperfections on the pasta. Those rough spots act like little hooks for sauce. Teflon-die spaghetti is pushed through a slick, non-stick mold, so it comes out smooth and shiny. Sauce just slides off.
Texture-wise, bronze-die pasta also feels more “toothy” — it has a slight grit that you can feel against your tongue. Teflon-die is slippery and almost waxy. In a simple aglio e olio or a chunky marinara, bronze-die pasta will grab the oil and tomato bits noticeably better. With a creamy sauce? Less important.
The catch: bronze-die pasta costs more (maybe $1-2 more per box). It also takes a minute longer to cook because its surface absorbs water more readily. But if you’re spending money on good sauce, don’t let it slide off into the bowl. Get the rough stuff.
Your pasta deserves a grip, not a slip.
