05-04-2018 06:32 PM
29-05-2018 10:29 PM
It depends on your need, usually, the X8 is much cheaper. So if you don't have a 4K TV. I would recommend you the X8. It allows you to record 8 tv show at the times, as much as the 4K. You have pretty much the same storage. The 4K is just a little bit faster.
Here a nice page that allows you to compare :