Multy Mini (WSQ20) vs Multy U (WSR30)

@Cornflakes1975,

We appreciate your interesting on our Multy series.

Multy U (WSR30), Multy X (WSQ50) and Multy Plus (WSQ60) all are independent WiFi System, only the same model can connect each other.
Multy Mini (WSQ20) only can expand Multy X (WSQ50) WiFi system for additional WiFi coverage. And it must be the last one node in Multy X (WSQ50) WiFi System.

You can refer to below Zyxel Knowledge Base (KB) link.
https://kb.zyxel.com/KB/searchArticle!viewDetail.action?articleOid=017498&lang=EN
https://kb.zyxel.com/KB/searchArticle!viewDetail.action?articleOid=017499&lang=EN