Saving .msc files only saves the list of plugins loaded into MMC and some of its configuration, such as the computer the plugin is connected to.
It does not save the settings that the plugin configures. So, opening Local Group Policy Editor will always show the settings on the computer you are looking at.
If you want to configure settings on one computer and copy them to another, you'll another tool.
Consider downloading and learning about LGPO from https://www.microsoft.com/en-us/download/details.aspx?id=55319
Honestly, it's a pain. I much easier to use Group Policy with Active Directory. But, if you cannot do that LGPO will work.