Better is very subjective, some people like washed out/ natural colours and some prefer more vibrant /artificially enhancedDo you think is better than official? Can Gcam extract the full potential of the cameras?
You would probably need to try both and decide which you prefer
It's just an APK, you don't lose the normal Xiaomi camera when you install the Google one so you can take a few pictures of the same scenes and make up you're mind which is best
There are some bugs in the gcam 8.1 and it doesn't save Everything to my gallery but I haven't had time to test it yet