https://www.m1.com.sg/home-broadband/devices/asus-zenwifixd6As per the reports here, M1 has replaced Zenwifi XD6 with the lower tier Zenwifi XD6S but does not reduce the cost. Please check with M1.
Review of Asus Zenwifi XD6.
https://dongknows.com/asus-zenwifi-xd6-vs-xt8-review/
Zenwifi XD6 is also listed in the best mesh solution list. It will be very good if you can use Ethernet backhaul. If you have to use wireless backhaul, then the more expensive Zenwifi XT8 (triband) is much better.
https://dongknows.com/best-wi-fi-6-mesh-systems/#4-zenwifi-xd6-the-xt8s-wired-alternative
Zenwifi XD6S has cut down a bit on the Flash size (not a real issue) and LAN ports (you may need to add a switch). Wireless performance should be the same.
https://www.asus.com/sg/Networking-...nWiFi-WiFi-Systems/ASUS-ZenWiFi-XD6/techspec/
XD6: 256 MB Flash, 512 MB RAM
XD6S: 128 MB Flash,512 MB RAM
XD6: RJ45 for Gigabits BaseT for WAN x 1, RJ45 for Gigabits BaseT for LAN x 3
XD6S: RJ45 for Gigabits BaseT for WAN x 1, RJ45 for Gigabits BaseT for LAN x 1