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Your summary is fairly correct, yes. Through a small aperture scope...as an example: through my 4.5" reflector, I see the planet Jupiter as a relatively small disk with two dark bands on it's 'surface' at low power. At fairly high power, the disk will be larger, but the view is not as clear/crisp, because I have reached my magnification limit for this telescope...which VARIES from night to night because of varying seeing conditions..ie: the presence of the jet-stream/upper or lower atmospheric wind/transparency. etc etc..
In my 12.5" reflector, I will see jupiter (as directly compared to the 4.5") as a disk at least twice as big with the same low power eyepiece, with a lot more planetary detail 'resolved'..And then we have the focal length factor of the telescope to contend with. As a rule of thumb, long FL scope's dont give you very wide field's of view, in other word's the bit of sky you see threw the EP will not be as big at...as another example: a 8" reflector at F/10 compared to an 8" at F/5 The F/5 will have a wider field of view (FOV) so it will take longer to move across your FOV if there's no tracking on the scope. (this also depends on what EP your using too) In a 8" F/10 at high magnification, the object your looking at is going to whip across your FOV really quickly.
There's plenty of stuff/articles on the net explaining all this better than what I can! lol
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