Which robot vacuum has better obstacle avoidance — the Roborock Q10V or the Dreame D20?

The [Roborock Q](https://www.amazon.com/s?k=Roborock+Q&tag=wehavethat-20)10V sees obstacles coming with cameras and sensors and sidesteps them smoothly, plus it learns over time. The Dreame D20 bumps into things and moves around them reactively. The Q10V is the better machine with smarter navigation, but the D20 is the better purchase for someone new — it cleans nearly as well, costs way less, and won’t leave you feeling like you overspent.