Wired will always be faster with equivalent tech. WiFi is a convenience that you pay for with a little more latency, usually small enough that you don’t care.

Always wired.

I have wifi6e. I love it. It can usually match wired speeds (1gbps) but there is interference and dropouts on occasion.

For mortals. Wifi6 with good signal is enough. But wired is always better.

Ethernet will probably always be better.

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until someone figures out quantum tunneling, it’s doubtful that radio waves will ever beat out copper wire.

Ethernet wins. Hands down, no contest. Speed of an electron along a copper medium may be slower then RF through free space, but there are so many more sources of interference with free space.

For 99.99% of applications the latency between good wifi and ethernet is non noticeable.

Ethernet always if possible is my rule

Always measure. Problems with your specific network setup can make the “best” technology perform worse than the “worst” one. If your ISP is run by idiots, or your wifi channels are congested, or if your router has been compromised and turned into a spam relay — then your network performance may suck even on the best technology.

Ping, traceroute, WiFi Analyzer, and other tools are right there. Use them.

Not directly answering your question, though they’re saying that wifi 7 will reach higher speeds than Ethernet but it will have higher latency.