Ahem, found this online, and other things stating something similar...
"Whole wheat pasta: Made from whole wheat flour or whole wheat durum flour, this pasta is not significantly higher in vitamins and minerals than semolina pasta because semolina pasta is almost always enriched with B vitamins and iron. However, whole wheat pasta is higher in dietary fiber and has a distinctive robust taste."
So, while WW pasta is better, the difference is nothing major. After all, the ingredients in my plain, golden brown pasta are the same as those Chewy listed, just without the wheat germ and fiber. Nothing "wheat". Enriched semolina is the same thing all pastas are made from.
So, forget this whole idea of using only WW pasta. I'll use it if I find it fairly cheap, but on a budget, and considering the nominal difference, I don't think there's much for me (or anyone else) to worry about. Oatmeal - bye bye. Pasta time for this Italian.