For better results you can try re-tensioning the belts Belt tensioning procedure | Bambu Lab Wiki and then run resonance calibration from the printer menu. Also you should try slicing at different speeds and acceleration in Bambu studio and see which gives you the best results. Slower (unless extremely slow) does not mean better. There should be a quite fast sweet spot going below which actually reduces the quality and produces more ringing. Check actual speed in Preview by selecting Color scheme → Speed in dropdown menu. Also in some cases order at which outer/inner walls and infill are laid out can make a significant difference. Using either Classic/Arachne slicer also can make a significant difference and its not cut and dry which is the best, it depends on 3D model you print. There is no single easy answer what will produce the best results, depends on 3d model, filament and other things.