Every 802.12-compliant AP can do it. They can even be of different brands, since it’s just the Wi-Fi equivalent of plugging your computer into a different switch on the same (switched) subnet.
The Asus stuff is bit fancier than that, and will do stuff like optimize which AP each device connects to via signal strenth. It's true mesh networking.
> optimize which AP each device connects to via signal strenth
That's how most 802.11 STAs (clients) make a standalone roaming/handoff decision. But if the vendor supports it (and the APs can cooperate towards providing it, such as yours, probably), there's also 802.11v, which allows the APs/network to make the roaming decision based on their respective load, view of the client's signal strength (and not only the client's view of theirs) etc. It's nothing unique to Asus, though.
> It's true mesh networking.
Mesh networking is something else yet, as it concerns how the backing network of the APs is created and managed. You can have 802.11v with Ethernet-connected APs, or plain client-side roaming with meshed APs.
