All Ledger devices are compatible with each other. They are all based on BIP39 blockchain protocol, generating and managing 24 words seeds. Of course, you must check before importing a seed from a Ledger device to another one, than the new one supports the same coin(s) than the first one. Otherwise you will be able to manage the common ones only.
For example you can clone
- 2 Nano S (or more)
- 2 Blue (or more)
- 2 Nano (or more)
- 2 HW.1 (or more)
- a Blue and a Nano S (or more)
- a Nano and a HW.1
If you clone 2 (or more) devices, they will synchronize the same addresses and you will be able to use both interchangeably.
You simply need to import the 24 words seed from the first wallet to the second wallet.
Here is the tutorial for the Blue :
and for the Nano S :