1, supports huge storage, maybe up to 1T by 2 SD slot so you get 512g x 2.
2, full touch screen so you can manage so many music quite easy like our X7.
3, supports optical/coaxial/USB digital audio out , and line out .
4, build in a headphone amp but it is not the important part so we can save the battery, cost and make it as small as possible.
5, with bluetooth (APT-X ) and supports bluetooth remote controller.
6, better system so it can deal with maybe up to 30,000 or 40,000 sound tracks.
7, maybe USB 3.0 supports
8, two USB socket one for USB digital out and one for power.
Source
Niveau design, voilà ce que cela peut donné: