How can you fairly compare one telescope to another? It's all in the (angular) resolution. The entire point of introducing telescopes into astronomy is to make distant things more visible.

Just how powerful is the world's most powerful telescope? Let's start with the human eye. The human eye has an angular resolution of about 1 arcminute. That's pretty impressive. Take a circle ...

In a groundbreaking achievement, the Event Horizon Telescope (EHT ... of M87 and the Milky Way’s Sagittarius A*. The angular resolution achieved through this 870-micrometer wavelength imaging ...

1a). As the diameter of a telescope's mirror increases, so does the angular resolution (the ability to discern fine detail). But the blurring effect of the Earth's atmosphere means that the finest ...