We ship worlwide. Yes it's exactly the same block. We are a D-tek's authorized reseller.
http://www.dtekcustoms.com/page.asp?id=3
We were the first one in Canada selling D-tek's items. The small difference in price is due to shipping and duties fees importing the block from the US. We were given insurance that we would get all our preorders covered and that's why we are accepting preorders.
If you have any questions please feel free to ask.