Well if either of those companies made a proper commitment to the UK market then I'd consider them.... Until then no
Part of the hidden cost in any device includes support, for hardware software and users. Now to take it back to your original question... Samsung and LG have all of these (at least for the first two years of devices lifespan) and Honor do but Xiamoi don't...
For example I've just tried to view the user manual for the note 3 from the UK site... The 'manual' is a one page pdf with a note and qr code on it and a link to the global site! Where the same pdf exists....
So clearly they aren't interested in me as a customer