As strange as this may seem, it is not possible to do that. Any calendars you enable/disable in the Samsung calendar will be reflected in the Google calendar.
However, you can get two separate installations of the calendar by using secure folder. I am a fan of this solution because it keeps all of your business stuff separated from your personal stuff.
- Enable secure folder by finding the icon on the phone's dropdown menu (above the notification drawer).
- Launch the secure folder app.
- Sign into your business Google account in the secure folder settings menu.
- Open the Samsung Calendar app which should be in secure folder by default, or add a copy of Google Calendar to the secure folder and use that.
You now have two separate calendar apps on your phone and neither is aware of the other's existence.