You guys do realize that Samsung Calendar is just a front end. You don't even need to disable it if you want to use the Google Calendar app (not even sure if you're allowed to disable it. You can turn off notifications though). If you have Google Calendar and Samsung Calendar on the same phone, they'll show you the same calendar and alert you of the same things. They're like 2 different doors leading to the same room. If you setup Samsung Calendar to be syncing to Google Calendar, then it will be syncing to Google Calendar.
I'm actually using Samsung Calendar on the phone since it follows the theme, having it sync to my Google Calendar so. I can view it on the web, which in turn is syncing to the Windows Calendar app on my laptop, and I'm using the Any.do widget to display my tasks and events from my Google Calendar syncing to the Samsung Calendar on my tablet. And it all works seamlessly because all of this are just a front end and they're all using the same data from Google Calendar.