Price is the big difference. The upside of going to the dealer is that they are more likely to use parts, fluids etc…that are made specifically for your vehicle. A dealer will in theory, also have the most experience working on your vehicle. You save a lot of money though if you can find a trustworthy independent shop. Also, you will usually have a better experience of the independent shop is brand focused, for instance Japanese focused, or European focused. If you have a truly “American made” vehicle, most do-it-all shops will be fine.