They have two different models in their description. Hopefully the will send the Nevo instead of the AR if you need all 18 devices. They are otherwise identical.

As you've already confirmed, each remote's commands are identical. So that's one device on the Nevo, not several. They will likely match one of our existing devices, probably an MCE, Ortek or NEC1 media center device, so no learning will really be required, aside from a few codes to confirm our assumptions.