Full well divided by the noise defines dynamic range. Lower read noise allows shorter exposures to reach the sky-noise minimum or produces higher signal-to-noise in equivalent exposures. Cameras with a higher quantum efficiency produce a higher signal-to-noise ratio. There are some technical considerations that affect image quality. If you push any camera hard enough, you will find some quirks, but some are really good at specific types of astrophotography: Scenics, Night/Sky/Star Scapes, Panoramas, Time Lapse The latest cameras are usually the best, but these cameras are mature now and while improving every year, the improvements are incremental and not Earth shattering. If you are looking to get a new camera, almost all of the cameras by Canon, Nikon and Sony made since about 2015 will work great for all kinds of photography.
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