I see it has two different products for two different use cases. Kdenlive is for those who missed Windows Movie maker or iMovie. Something to stitch together videos, or split apart videos.
DaVinci Resolve is for those who need stable professional software like adobe.
Not saying that kdenlive can’t be used professionally but I found its stability lacking, its tools unpolished and its functionality limited. The only benefit is that it can handle aac audio, and export it too thanks to ffmpeg.