Just want to know what other people use.
Samsung Messages -or- Android Messages
Samsung Internet -or- Google Chrome
Samsung Calendar -or- Google Calendar
Samsung Calculator -or- Google Calculator
Samsung Email -or- Gmail/Inbox
Samsung Clock -or- Google Clock
Samsung Notes/Reminder -or- Google Keep
Samsung Touchwiz -or- Google Now Launcher
Samsung Health -or- Google Fit
Samsung Pay -or- Android Pay
Samsung Keyboard -or- Gboard
Samsung Music -or- Google Music
Samsung Gallery -or- Google Photos
I mainly use everything Google and I'll tell you why. Before I tell you I'll answer your question. All those apps you mentioned, all Google, except for Google pay because I do use Samsung Pay.
Now to mention why I use Google, is because I am able to use those apps anywhere. For example I create a note in Keep, I can go to any computer and just to go
keep.google.com and I can view my notes there, edit them, and do much more. That's only Google Keep, I can do the same with anything, Google Photos, Calendar, etc. I can also use Android Messages on the computer as well, which I find useful.
In general, yes some Samsung apps do contain more features, but in my experience Google apps are a lot more polished, faster, and overall a lot better. For example Samsung Email is terrible, having to constantly be pressing "Load images" and "Load more", which makes an Email take longer than it should. Animations are slow, and Samsung keyboard is a whole different story. I can't use swipe while being able to move around the cursor. The swipe feature is frustrating, doesn't get it right, and voice recognition is better on Google keyboard than Samsung.
I don't use Pixel Launcher because it's limited, so I use
Lean Launcher which basically is the exact same Pixel Launcher but way more customizable, I recommend you check it out. Try out Lean Launcher, and I also have
Package Disabler Pro to disable all Samsung apps including all Bixby related, and others.
Basically to conclude, I find Google apps a lot more faster, polished, and most importantly, I can use any of my Google apps online, whether is a Windows operating system, macOS. iOS, Android, you know, everything. While Samsung apps, will only work on Samsung phones and certain tablets. Other than that you can't view any of them anywhere else.