Well, it's smaller and lighter than a DGX, albeit thicker as well. The speakers don't frapp out like a DGX, and with incredible bass.
Only 107 styles, the acoustic guitars and strings are nowhere near as good as the DGX, *but* the drums, and especially the bass drums and bass synths are great (the speakers seem optimized for them; you can crank them up all the way and they won't frapp out). Piano isn't as clear as Yamahas, but nice and warm and expressive. The pop styles in particular are from some very recent songs (Bad Guy, Shake it Off) and I wish Yamaha would come out with some more modern styles. Both have mic inputs, but this one has a vocoder/harmonizer, which means I think the gigging musician will actually lean towards the E50.