As a proud owner of an LGV30 and a Dragonfly Red, I thought I would give my 2 cents for people asking which is better.
My testing headphones are a Mr Speakers Aeon Closed back, as well as my Earsonic EM-9 IEMs (which I just got today
). The Mr Speakers unit is a planar magnetic headphone with a neutral sound signature. The Earsonics unit is a TOTL BA unit. I am using UUAP for both the Dragonfly Red (when running it through my LGV30), as well as to get the settings right for the LGV30 when not using the Dragonfly Red. I am playing 320kbs files through the Google Play part of the app. Listening mostly to jazz ( bebop, fusion, modern bop, postmodern) as well as some rock, folk music, RnB, heavy metal, hip hop, and some alternatvie / indie / pop. I also watch movies and tv with the Red on my laptop because I find it enhances the experience.
In my opinion, the Dragonfly Red is much warmer, clearer, and I can hear details better than on the LGV30. Honestly its not even a real comparison, there is nothing I like about the LGV30 that I miss when I'm using the Dragonfly Red. Everything simply sounds way better on the Red. The most immediate difference is that the Red is much much warmer. If I were to use an analogy, I feel like when I bought my first tube amp as a guitarist and I had been playing with cheap solid state amps before. My music sounds sparkly and warm sounding on the Red, while the LGV30 (which does sound good, don't get me wrong) sounds flat by comparison.
Obviously the LGV30 is slightly more portable, since you don't have to deal with the dongle. I hear a very big improvement in the LGV30 over my previous Androids and iPhones and I'm glad to have it when I'm at the gym and am not using the Red.
So to conclude if you are considering both and want the best audio, the Red is just a much much better experience in my opinion. I've had both for hundreds of hours of listening time, but it takes about 10 seconds to hear the difference its so drastic. Of course YMMV.
I should also note I bought the LGV30 several weeks after the Red, because I needed a new phone, so this isn't someone who just got the red and is super excited about it, I've broken it in and tested both quite a bit. But again, I think that if you compare the two side by side it would be hard to argue that the LGV30 is better as the difference is very drastic.