I think it's a no-brainer that a beginner should do FOWLR 1st. Corals are more picky about water conditions , perfect flow-rate, etc. than fish.
I don't know if i entirely agree with this. They are a bit more particular about water conditions but overall there are some corals that are easier to take care of then fish. It all depends. There are a lot of fish out there (mandarins, some blennies, butterfly) that are more particular about what they eat and are much less hardy and bullet proof then some people give them credit for. Not going to say that a FOWLR
or a reef is easier either way but don't let the idea that all corals are difficult to keep turn you away from a reef. Your going to have to be careful about what you put in your tank either way.
bucjason not trying to take a shot at you or anything. just giving my opinion/experiences.