Yeah I could tell this from virtually every sample I've seen on the internet. The S9 is clearly very very good, but nothing touches the Pixels camera and that's why I will struggle to use anything else.https://www.theverge.com/2018/3/13/17099184/galaxy-s9-pixel-2-camera-photo-comparison
Very impressive results here. The Pixel 2 though looks like it snaps the best shots to my eye. Warmish tone compared to the white balance of the S9, but the detail it retains and the dynamic range are remarkable. Imagine what a Pixel 3 could potentially do with a dual lens setup. Holy crap.
No matter what you throw at it, it always seems to give you a good result and that's not always the norm with phone cameras.