Again, it is not just shared words.

The earliest references to the orange version of marmalade, was marmalade made for Queen Catherine of Braganza (A portuguese noblewoman in the british court). It's innacurate to claim they are just phonetically related.

The question isn't whether they're historically related, but whether they are sufficiently similar as to be comparative -- the american hotdog and the german sausage may have shared elements, and presumably shared roots, and I wouldn't doubt that the hotdog is a modified sausage -- but they are so distinctly different in taste, texture, quality, usecase and goals, that it doesn't really make sense to say that the german sausage is a better hotdog, or vice versa. Even if the hotdog was still called a sausage. (and sticking a full sausage on a hotdog bun? A criminal act if I ever saw one)

If it doesn't look like a duck, and it doesn't quack like a duck, then it ain't a duck. Even if you called it a duck the last 500 years, it still ain't a duck -- at least, it's not a duck like my duck's a duck.

Right, but since then "marmalade" has become a citrus jam containing the candied peel of the fruit, far more like other jams, and really quite dissimilar to the quince product from which it draws its name.

It's merely a categorisation thing I suppose, but to me they occupy very different niches, and saying one is better than the other is comparing quinces to oranges...