Hmmm... I've not paid much attention to the N3 -- appears quite nice. In answer to your last question, I don't know if the PD battery is user-replaceable. The case has some very small phillips head screws, so I assume you could open it up. But I haven't opened mine up, and haven't seen any pictures. As far as comparisons, there are pluses for both. PD: Battery Life (hugely better) EQ (very good) N3: Line out Digital out BT/APTx Accepts 256Gb microSD (PD limited to 128) Price So the N3 advantages come down to features you either do or don't care about, and price. PD advantages are battery life and the EQ system, which IS really great. It's the only EQ I've ever used on a DAP, and I use it for both my CIEMs (to brighten up my Aurisonics, and to add bass to my Frogbeats). Hope this helps. BTW, I personally love my PD for on-the-go listening. So compact, and I NEVER worry about battery life. I just stick it on a charging cable once a week and forget about it the rest of the time. I notice that there are no reviews of the N3 here. I suspect that if you wait for folks to receive their MassDrop purchases, you'll see lots of reviews show up. GLTY.