These have both been taken with the exact same camera from the same location. The one on the left is with the OnePlus camera app, and the one on the right is from a community modification of the Google camera app to work on the OnePlus 12. The Google one looks a lot better because they use super-resolution from multiple short exposures automatically.
The Google camera app does not usually look better without zoom (in my short time testing) and also has a harder time focusing.
Which gcam and XML are you using?
9.2 from https://xdaforums.com/t/oneplus-12-gcam-discussion.4672393/