I may be wrong - but i don't think the engineering degree allows you to specialise in biomedical engineering like melbourne does???
Yeah, they used to, looks like that's changed.
I'm guessing their logic here is that biomedical engineering is a combination of biomedical science and some aspect of engineering - whether it be electrical signals in the body, development of aesthetics to make limbs for people, etc.
So, this double means you get the biomedical part from the biomed degree, and then the type of biomedical engineering you want to do would depend on what stream of engineering you take from the engineering part.
For example, I have a friend interested in biomedical engineering, but she's interested in work that's going into the bionic eye. So, she's pairing a physiological-based science degree with an electrical engineering double degree.