If you can be guaranteed that you will always be able to get a job in the aviation field, then go for the aviation degree. If you are getting the degree to broaden your education or open your employment options, then go for something else. However, many companies don't look all that closely at the degree itself, but just require that you have SOME degree...
Accreditation is another thing to look for. Many on-line or other private schools that cater to specialty training are not accredited, or are accredited by organizations that are not really regarded as "proper" accreditation. Research the generally accepted accreditation organizations for the type of school you choose.