I wouldn't say Streamlabs is more robust - it's the same core of OBS Studio, with Electron instead of Qt for the frontend and better Streamlabs integration.
For newbies, it also comes with a ton of demo content and setups (pre-roll, transition, etc), to ease the learning and spin-up curve. Agree that doesn't make it more robust (see my other comment). I have no affiliation with either project, just an Old Guy learning/doing some streaming projects.
