Are all boxes the same, interface wise?

[A&S&O]

This might seem a controversial question to you experts, but do all boxes running Enigma / ViX look the same, user interface wise and have the same capabilities?

Do they all have the same EPG, setup, record / playback appearances / interfaces?

I've recently bought an Xtrend 8500 (finding it quite complicated after the easy to use Topfield) and am looking to get an additional box for a different room (probably saving recordings centrally). As the Xtrend has been reduced, I didn't know whether to get another one of those, or go for something different. I did intend to use the Xtrend as the Master device for recording and playback in one room and get get a cheap playback box for use in a different room.

I realise there is a difference in picture quality - HD, 4k etc.

thanks