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You will not notice the obstruction in a reflecting scope when looking through it, however using a reflector for terrestrial applications the view is flipped or upside down.... Not so with a refractor. Coma , aberrations etc will be present in any cheap scope, but really matter more for photography, the discerning viewer wil purchase a much more expensive scope anderhaps add something like a paracorr.
On a really cheap scope you may notice a purplish edge to bright objects like the moon, again you get what you pay for.
Reflectors need collimating, refractors don't.
Given your desire to do some terrestrial work I would stick to binoculars or a refractor.
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