OP / @dwhess Fundamental to our hobby is trying things / approaches/ gear, etc., listening, and making judgements and informed choices based on what we hear and do not hear, what is pleasing or not pleasing to us, what is acceptable and what is not.
None of us can inform you of what you will or will not hear or experience or not experience.
Having said the above, in my experience, the probabilities are in your favor and you are likely to hear a difference between your current WiFi setup into your current Yamaha component WiFi adaptor/card vs. running a LAN cable (even a basic one run across your living room to test it out) should you spend enough time listening and learning how your system sounds with each approach. If you have the opportunity to borrow a higher level LAN cable from an audio buddy or obtain one on loan from a dealer, etc. I believe you will be surprised by the differences you hear.
Keep us posted on how it goes and what your results are.
I've been fairly busy and will do my best to post why I believe it is far better to run wired with a LAN cable vs. going WiFi... at this point in time.