Holy crap, guys; are you trying to kill OP with info overload?
I’m ignorant of ZeroTier… what cipher are they using? They’re not all equal. Regardless WireGuard’s ChaCha20-Poly1305 is going to be faster than, say, OpenVPN’s AES-256 no matter the device.
No, routing would not be automatically set up for this but it’s suprising easy to get online. Be sure to set up a Preshared Key as a extra layer of security. Here’s the HOW-TO: