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I am in no way an educated guesser even about this topic, but I didn't think your thread should get dropped to the bottom without a reply.
Well field of view would be different, the refractor wouldn't produce diffraction lines, refractor would need a field flatterner, and I think similar would be needed for the SCT and RC. Operation and maintenance would be different for each of the scopes. Weight and length of the OTA would come into play as well as they would affect your mounting choice.
As far as beginner equipment I personally would suggest against it. The shiny pretty bits are wonderful, but difficult equipment that drives you from using it will just make you abandon the hobby. A good refractor can always be used as a guide scope when you upgrade down the track, which makes it a great choice for beginner astro scope.
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