Ok, first of all you don't "lose" Samsung's features or camera app. The Samsung camera app is still there alongside the ported Google Camera app. Neither overlaps or replaces the other. You can alternate use as you see fit.
I don't know if this is the same one of several months ago, but from the date of the article, it looks like this version is from April. I just got back from a local park and took a series of 4 pictures with each app, using just the standard, rear camera. The Samsung photos are a little brighter. Honestly, I thought the difference was minimal. I have ported the Gcam to other phones such as the Galaxy S9+, LG V30 and Razer Phone 2 and have seen more dramatic results than on the S10. There's nothing to lose. If you don't like the results, you can simply uninstall the GCam and remove the configuration files. Now that Samsung has the night mode, I would say that if you're satisfied with the pictures you're getting from your S10, it may not be worth the trouble.