Better result with steam mink than using the link cable connection?

I've been testing all possibilities lately with my new Quest 3, and it turns out using a dedicated router(Gl.iNet GL-MT3000) with Steam link gives me the best result so far( Inhaven't tried VD yet )

When I use the cable, I often hear crackling in the audio.. something that does not happen while using wireless.. Image is stable and about as good in both scenarios though! The only issue is the crackling audio while using the cable.

What could explain that? I was assuming cable would win over anything ..