The NW-WM1Z is far more analog with thicker notes. Sony is SO AMAZING with my Shure SRH1540 headphones. The LPG is far more reference, with better resolution. LPG kicks like a mule because of its power. With the correct PMEQ settings, my HD650s sound better from LPG than a Bottlehead Crack tube amp. I need both DAPs in my life, because I like reference and analog, tube-like signatures nearly equally. I do like Sony a tad more, which shows me graphs, charts, power, and resolution isn't everything. The bass in Pink Floyd, Not Now John off The Final Cut is so juicy on NW-WM1Z.