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.
The main problem with wifi isn't the amount of latency. It's the inconsistency of the latency. Packets just get "stuck" for way too long sometimes, even if the average latency is good.
I was really into Overwatch when it started. When I got into Master/Grandmaster, every tiny lag spike would happen at the worst time. It convinced me to run a 250' cable throughout our house lol.
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.
Yeah, the echo reply from my WiFi router comes in <1ms, the round trip to the game server in Seattle is minimum 100ms. So Eth vs WiFi at home is not so important if the WiFi is stable and the use-case is supported. My current router is 100% stable and maintains same low latency (no spikes), my old dropped connections sometimes and fluctuated.
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.