Biomedical Science encompasses so many fields of exciting research in medical field. For example they look at improving x-ray equipment,improving the effectiveness of a birth control patch, reducing the size of capsules based on the size of the ingredients. While biotechnologists will look at utilising the resources in a better way. Like developing better foods more effectively. The field has got scope because the world is populating at a very rapid rate and resources are becoming difficult to share.
In short both the careers are lucrative in terms of career opportunities and remuneration.
Nevertheless, what you select will depend a lot on your interest.
TO read up more about the careers log on to http://www.youngbuzz.com/careers/career-options
It will give you information on career scope,remuneration,benefits,career map etc
This will surely help.