Yeah I've just been taking some pics here in the dark of pumpkins for Halloween with the Ultra and they have come out great.So far I do feel the s21 ultra is better. Not in every situation but feel it’s more consistent overall and has more modes and options. 10x optical is such a great feature.
That said pixel camera should only improve with updates though. I would say the ultra has better night mode. For point and shoot though pixel still nails it in most situations
I would say I wouldn’t upgrade to the pixel just for the camera as there isn’t much of a difference in most situations
The good thing for me is that with having the Ultra as my Android fix I'm not in a rush to get the Pixel so if they do improve the camera and other aspects of the phone later then I might bite.