The 107D is the drive itself, regardless of package.
Per your second question, I saw the Czech origination, too. The assignment of "D" or "U" is not clear to me: Either seem equally available, so I question regional warranty terms.
As per my previous posts, I asked Pioneer for clarification on each designation. What is A07D and what is A07U? ... but received nothing...
.. except a manufacturer scolding. DON'T BUY OUTSIDE YOUR COUNTRY. You buy the non-US version in the US, and you've got no US guarantee. Even if that non-US channel is legit.
It appears that it (D vs U) is ultimately some kind of packaging scheme designed to restrict warranty terms -- symbols designed to control corporate risk.