Measuring speed in a Wi-Fi context is difficult, as throughput and lag are often dependent on which specific devices are at either end of the argument. Get a MU-MIMO router and a wireless card that supports multiple channels, keep them free of obstructions, and there’s no reason you can’t achieve throughput way beyond the maximum capacity of your broadband connection. Mesh might not be quite as easy, because there needs to be a backhaul channel managing communication between the nodes. If, like Linksys’s Velop, there’s no dedicated wireless radio for this purpose, you may find inter-device communication slightly slower in busy periods. Unless, that is, you choose to do your hauling via Ethernet, at which point, the argument turns on a dime.
Ethernet, even if your home is strung up with drilled-through lastcentury Cat 5, should be able to support Gigabit networking. It’s faster than even wireless. Maximum throughput depends on the quality of cabling as well as rating, and if you’re installing today, you’d be a fool not to string up some 10G-compatible Cat 6, which improves Ethernet’s susceptibility to crosstalk, as well as boosting its top speed.