I'm a fan of the Vstrom, but I know it's not much appreciated in the UK .. faulted mainly because of "looks".
But, IMHO the Wee is the better bike in many ways.
If you have not ridden both motorcycles ... I would do this FIRST!
in the end, your opinion is the ONLY one that really matters.
Maybe better to wait it out, try to find a LOW-er mileage Vstrom and stretch your budget a bit?
I know dealers in UK are stand offish about buying "high mileage" bikes ... I went to 6 BIG dealers in the London and Oxford areas, NONE would even consider my mint condition 3 year old Triumph Tiger with 30K miles showing. None would even make an offer!
I ended up doing a private sale and did not get much for the bike.
Me thinks folk are seriously into winding back Odometers in the UK!

Over and over, I saw really Crap bikes showing ridiculously LOW miles on them. I was born at night ... but not LAST night!

That practice is highly illegal in USA and we keep track of it!
If you must sell your bike on in two years then I'd start advertising it well ahead of departure ... or consign it to an honest dealer (

) and collect your money once it sells.
Good luck! You really can't go too wrong with either bike. Both solid, reliable and comfortable machines.