Telescopes mounted on Earth-orbiting satellites are better for observing the universe because they
1. collect only gamma radiation for images.
2. are outside the influence of Earth’s atmosphere.
3. collect only infrared radiation for images.
4. can be remotely controlled.
A powerful telescope on earth is still at a disadvantage with a mediocre telescope above Earth’s orbit because of the atmosphere that can scatter light coming in from space.
So yes, they are better because they are not influenced by the Earth’s atmosphere.