What. Have you owned either?
This a serious question? Why would I comment on something I've never owned? Yes of course I've owned both. I liked the sub bass better on the Audeze but that's about it. Micro detail, resolution, vocal accuracy, tone, coherency all went to the 650 for me. LCD-2 from the Lyr 2 and Chord Mojo and also many other amps ranging from 500-1000. 650 with the Bottlehead Crack, Lyr and Eddie Current BA won it out for me. I thought the 650 and LCD-2 are comparable with the 650 doing most things slightly better but the Sub bass, bass extension and texture was better on the LCD-2. The LCD-2 is a little drier to my ears