HomeKit Hub performance in different devices

With HomeKit operations being done on the hub you have selected, would having an iPad Pro give you better facial recognition and video AI, just a few examples, than if you were using an AppleTV or HomePod?

Not sure what you mean, but I’ve got more than one device as a hub, and it always works. Any device that can function as a hub will do so.

Not sure what you mean about AI on an iPad pro in relation with Homekit