Alright it really depends on how much you're putting into that chem degree. If you want a BA then it doesn't have to be that hard. If you want a BS you might as well do chemE b/c those are the only addition courses you would have. If you aren't interested big deal. ChemE's are chemist's bosses. So it would suck going through all of that for a BS only to have your friends working above you. You seem to have the ideas right for chem/chemE stuff except I think a chemE degree is a lot more versatile b/c they don't just learn chemical processes. They can process anything from food to computers to anything you are interested in. Chemists work with chemicals pretty much.
Depends on what you're interested in, I guess. I had the same decision and ChemE just seemed more appealing.