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The important difference is that Maksutov cass. use all spherical surfaces whislt the SCT has an aspheric corrector plate and hyperboloid secondary. More likely to have a smoother more accurate wavefront in the Mak, and being all spherical the smaller ones can be manufactured more cheaply. On the downside the Maks are usually F12 or slower which is a bit of a narrower field than the SCT. You may be able to get a visual tele-compressor for both.
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