There’s more discussion of various Switch features in the following thread. The light switch discussion starts around post 40.
As far as set up’s using physical traveler wires versus those using virtual wireless communication, it just varies by brand. All of the GE switches and most of the Levitons use physical traveler wires. Cooper, GoControl, Homeseer, and I think evolve don’t use physical traveler wires.
The lutron Caseta line is unusual in that you can either use its own wireless auxiliary (the pico) or you can use physical traveler wires to connect it to a traditional nonnetworked toggle auxiliary. But in that case you only get on/off from the auxiliary, you don’t get dimming. But it is an option that most of the other brands don’t have.