Hello Maged,

I don't think this is the reason for its lower price.
Probably the SD-1 in US has the same problems that they have mentioned.
It doesn't make sense that the OS Ver.1.0 for Europe is different then Ver.1.0 in
USA. At least it is easy to copy software package from US SD-1 to EUR SD-1 if there is a difference. But I don't think that is the case.
In the list of OS enhancements for 2.0 you can see many things that US users are waiting for (rootless chord recognition etc). So this will be equaly implemented on US models too.

I think the lower price has something to do with up to 20% discount for export out of Europe.
In Europe you pay special tax which doesn't apply if you order it for US. Don't forget that the tax is included in their price so you can not see it like in US. I think somewhere on the Synthplanet site you can even read about it.
I believe them because I had similar experience when I wanted to by accordion from Guerrini, Italy.
They told me that if they ship the instrument directly to me I will not pay the tax which others pay in Europe.
It make a sense to me.

Regards