First things first...audiology is a high demand job. I am a 4th year and currently looking at places to apply and Im having a very hard time because there are so many places to apply to, Im not sure where to start.
Second, being a GOOD hearing aid dispenser is a perfectly respectable career (I do realize that there are AuDers out there that disagree with me, but I think they fill a certain niche).
But there are some MAJOR differences. The first being that dispensers can only do hearing tests for the sake of fitting hearing devices. AuDs do hearing tests to determine pathology and then fit hearing aids if they are appropriate. We also do large amounts of balance testing now. We also fill the spot of intraoperative monitors, one hand of the diagnostics for Auditory Processing Disorders and Menieres disease (if you do ECochG). Yes we fit hearing aids but we are more on the end of diagnostics. We look for something else on the audio than what hearing aid to fit...we are looking for what could be the cause of the hearing loss and should we refer for medical treatment prior to fitting. Then you cant discount all the pediatric work we do--we do newborn hearing testing, testing before and after PE tubes, and hearing testing for schools. We also do cochlear implant programming.
So it is really a matter of preference. Do you want to be involved in only the technology end of things or are you more interested in the diagnostic end of things? Dispensers only work with a small subset of who AuDs work with...so it really is just a matter of which one you want to do. Also, if you decide you want to pursue being a dispenser, just know that you can always go back and do audiology if you want to do more.