Keep in mind the different focal lengths.
For visual I think the f9 ED100 is better suited.
For beginner imaging I'd suggest the Megrez 90(f6.9/f6.2) is better suited, but one without the DDG focuser.
The problem with the Meg90's is all the different versions they have made. But the early versions are very good which is why they don't often come up for sale. I wish I never sold mine.
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