Fenix 7x sapphire solar vs sapphire dual power

Hi all. 
I’m in the uk and looking at getting a new 7x

I see some branded “sapphire solar” on the back and some “sapphire dual power”. 
As I understand the “dual power” branded are Japanese/imports!- correct me if I’m wrong?

my questions are…

is there any difference other then this Inscription on the back?

Will the Japanese/imported versions run/can be set to full English language so I can understand it, or will it have Japanese text/symbols?

should I get any problems, will an imported model still be serviced in the uk?

any other issues or problems you can think of getting/using a “japanese” “dual power” inscribed model rather then a “European” “sapphire solar” inscribed model?- asking as I can get the “dual power” for £250 less. If there’s no other difference other then the writing on the back of the case it’s a no brainier