Correct! It sort of like how you can use different browsers to see your bank acct. The bitcoin is locked by Math on the blockchain and most any hardware wallet can be loaded with your seed and used as the key to move it.

This is why its so important to secure that seed!

There are more advanced details to this, but that is the gist. If you get two of the same hardware wallets you don't have to sweat the more advanced scenarios, you can just play and see how cool it is. 😀