@ketchup . thanks for the clearing this point up, much I could read the pulling of files across the network was not described very well.
The difference between the Lumin and Aurender, is the Aurender can pull music files across the network, whereas the Lumin requires a server software to push to the endpoint. I can see advantages for both systems, the aurender has the simplicity of username, password, and processes the metadata and the file locally.
The Lumin handshakes with the server to decode metadata, change sampling rate to match the file and away it goes. The Lumin provides flexible choice of server (Audirvana, minim server, Jriver for a start), uPNP and Open Home protocols, Aurender has the Conductor software, that's about it. IF Conductor is not to your liking, there's the rock or the hard place.