
Nope, no difference. The 8G and 4G are just the amount of on board flash. And I have the bigger one, but frankly would be fine with the smaller, as I just use SD cards any way. I don't know anything about the quality of the line out, except that to me it sounds great. But I love the HiFiMan sound. It's not harsh, it's not terribly accurate, it's warm. It sounds good. I also love tube amps.
Okay, so HiFiMan + ???? or Sansa Clip+ + Digizoid Zo2 (or something else).






