At ROOter we have been using the WE826-T ever since it was first supported by OpenWrt. It is a well used and supported device.
The big difference to many people is the Wifi between the Q and the T.
The T is MT76 and the Q is Ath9k and most feel that Ath9k is better supported and works better.
I was doing image creation for a company that sells plenty of WE826-T but wanted a similar router that had better Wifi. ZBT did not, and still doesn't, have a firmware for the Q that is newer than 17.01 and that has terrible modem support.
We finally figured out the problem without any help from ZBT as they were uninterested in firmware that wasn't 17.01.