I got a Note 8 my main driver and I "inherited" a Huawei P20. I use both, although my Note has my sim card. Of course the P20 camera does very well in low light and certain situations, but not as quick as the Note 8 camera. P20 also lacking refinement, so the stock camera app feels almost like a 3rd party app, while the Note camera app is just smooth and well integrated.
With my P20, sometimes I come out with blurry shots, not sure why, while with the Note 8 it's almost a sure thing to produce a good image. Low light is not everything and shouldn't be used as a measuring standard, although the Note 8 is definetely no joke in low light situations and without switching modes and messing with the settings.
With all this said, I'm torn apart between the 2, it's really depending on the situation and place which one will produce a better shot. One thing for sure, both beats iPhone 7 cam, as I browse through my google photos album I can almost dell which one was taken by the iphone7 without pulling up the photo info. My best shots though - and laugh all you want - were produced by my old Note 5 , couple years ago. All I gotta do is browse my photo gallery and without knowing, I pause by pictures I really like -and so do others I'm showing my album- and soon as I pull up the info on it, it's surely taken by the Note 5.