The goal of the SLS was to send a crewed capsule to Moon orbit and bring it back. It achieved that result on the first launch, except that there was no crew in the capsule. Just normal NASA performance.
The goal of Starship was to take 100 tons of payload to LEO, fly a crew to the Moon, land on the Moon, lift off, return to Earth. And then go to Mars etc. There is no reason to believe that it will ever be able to do any of those things.