Plenty of factors to consider. Do you like doing procedures? Do you like interacting with patients directly? Having potentially long term relationships with them? Do you want to develop some level of entrepreneurship in starting your own business at some point? Do you want to focus on a really specific area and be an "expert"? Do you prefer to work in a hospital or a more community oriented setting? These are all questions that might help you weigh up differences between the two.
Also, have you done work experience in both areas?