What is it you want to apply to, is I think the key question. If you wanted to apply to a product design course, DT might be very useful or relevant; for something like engineering, it generally isn't specifically helpful (although for most engineering disciplines, chemistry isn't either other than generally giving you more experience of working in a scientific, experimental paradigm). If you wanted to apply to something completely different, like business management, then it probably doesn't matter which you take though.