username1234
Performance-wise, the Dynalink router is slightly better than the gl.Inet one, however, the difference in performance is small, so you probably won't notice anything in day to day usage. Both are capable to achieve required Wireguard speeds and should be more or less the same.
The main difference is in firmware though: with vanilla OpenWRT (Dynalink), you have to first install it, then download additional packages, configure extra things to make it work, etc, which can be challenging and is definitely a learning curve. You will certainly spend a lot of time researching and reading OpenWRT forums, which can be confusing.
On the other hand, the gl.Inet router is already configured out of the box (they use their own firmware based on OpenWRT), has all the necessary settings available and the GUI is much more user friendly and is polished. Its a consistent experience without the need to dig the terminal or forums.
Their customer service seems to be good too as I have sent them an email with a few questions and they got back to me pretty quickly.
Yes, a true enthusiast will prefer vanilla OpenWRT vs router manufacturer's own (closed source) firmware based on OpenWRT for security and privacy concerns but so far no one ever found any "dodgy" behaviour or telemetry in gl.Inet routers (others can correct me if I am wrong).
Based on this, I would say go with gl.Inet Flint 2. It has outstanding specs and will serve you well.