What is a “better” onion? More variety, maybe? Onions come in two kinds for me (other than type) edible and not; not a lot of spectrum on onion quality for me I guess.
Just about any other fruit or vegetable I can accept the varying quality of produce but onions and potatoes are either firm and good or mushy and not for me.
Or I could be overthinking what was probably an arbitrarily pulled example for an explanatory analogy.