The Taiko Wi-Fi is configured to run at the lowest possible transmitter strength, at the slowest protocol, and uses a small antenna. I can absolutely hear the difference, similar to what @TWJeff described, but it may very well be subject to the environment it operates in. Although there are plenty of neighbouring Wi-Fi networks here they’re all pretty weak.
If the Taiko Wi-Fi is being “pushed out” by stronger neighbouring Wi-Fi networks, at the same channel for example, or even worse, configured to operate on unfavourable channels, like 2,4,5,7,8,10, then you either need to change the channel, increase transmission strength, mount a larger antenna (hardly ever necessary btw), or switch to a different protocol, for example N or AC at 5G will always work stable. We’re aware logging into the router and changing these settings is not as easy as selecting a different output in Roon so we’re working on making this all configurable from a remote app..
Do you have any theories as to why using the Taiko router wifi would sound better than using one's home wifi + port forwarding?