Questions about Paper Tablet

I briefly asked in the chat on the manufacturer's website.

Here is the answer:

Me: Hello, what is the difference between Paper Tablet No.1 and No. 2?

Carin: Hello and welcome to our online shop.

Carin: Paper Tablet No. 1 is exactly the same version of the Paper Tablet you get in the set.
I.e. if you buy a new Paper Tablet Nr 1 after the first one, you first have to block the first Paper