Idk if this is a dumb question or not lol but everyone is this duel game is arguing about it.

So a wired connection gives lower ping/less lag than a wireless connection.

What if you're connected directly to the modem AND wireless, is it better than just a wired connection?

No. Your PC will prioritize ethernet over wireless. Having a wireless connection won't do anything if you're hard lined.

This, Other than if you bridge the connection. But that is pretty pointless unless you have a second internet connection.