X1 6th generation and X280 (is the X280 now a ultrabook)?

Hi

I have successfully installed and used linux for the X41/60s and 200s.
Since a couple of month I am using an X1 5th generation (it is a
Lenovo Thinkpad X1 Carbon 14" Intel i5-6200U, 8GB RAM, 256GB SSD, I
presume it is 5 generation) with Ubuntu 16.06 and like the features of
that ultrabook, nice screen, fast, light thin, long batteries life (I
however don't like the keyboard that much nor the fact that I can't
easily change batteries/hard disk/RAM).

It was my understanding that the X200 series had a smaller screen, were
bulkier, but batteries/hard-disk/RAM could be changed.

Now a friend of mine wants to buy an ultabook like X thinkpad.

To my surprise it seems that the new X280 is much more a ultra book than
the older ones. It is much thinner than previous models, however it
has the same weight as the X1, but a smaller screen so I presume it is
not as slime. Somebody has experience with that model?

What is about running Linux on either the X280 or the X1 6th
Generation?

Thinkwiki does not provide information on any of these models.

Thanks and regards

Uwe Brauer

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