The Benelux country manager responded:
We do not know when the first Model X will be delivered in Europe or how much time there will be between Sig en GP. We also do not have info about pricing but I think it will be comparable to the US Model S vs Eur Model S price difference.
The Signature is specifically a special, limited edition, besides being delivered earlier. Elon makes it no secret that your deposit is used to develop the new models.
But you will be able when you get the invitation early next year to configure, to go for a General Production model and then you will be first in line to receive on of the first 'normal Xs'.
You - being no 44 in Europe, have an awful lot of people behind you
end quote
You will have even more behind you !
She also added that her expectation - not official - off the record - not to be quoted - is that deliveries will be mid year - but I did not put that in this post.