I don't really know both brands, but Lumin's system is optimized to work with Minimserver, which is far and away the best music server system for classical music (and is donation-ware!). So if you have a large classical collection on a server, like me, you'd want Lumin. It also seems to have more format capabilities (MQA, DSD, etc.)
Lumin vs Auralic
I'm finally moving to streaming audio. I've done a bunch of reading and have narrowed down my search to one of two models: Lumin T2 (which is finally shipping I hear) or the Auralic Vega G2. For those that know both brands, and have had a chance to audition or work with their software platforms, which would you recommend? I prefer the one box design....so I end up sending less on cables/interconnects. I just plan on using Tidal....fyi. Any feedback would be appreciated!