Hi Mark
1.) Poly V belts last longer, slip less, has a wider contact area, have no joint that might cause vibration ..... it's a better belt system.
2.) Yes you can only use the 10" blade with the scorer but when I need the 12" I have the option available to me on the Hammer.
3.) Simply put you have blades available in the US for both machines. The pins are for your own protection and for extra safety due to the heavy breaking feature of the electronic breaking on the Hammer blade.
4.) The European dado sets are something to be experienced.
5.) I do not know enough about shipping but everything has a reason.
I guess I am on a different page then. I would rather deal factory direct with a company producing their own machines, it's worth the extra money to me. I have also owned many machines over the years and for me the question has never really been about how long they run, in this league they all run for many, many years. It has been the fit and finish, the details make the difference. A European manufactured machine is simply produced to a better tolerance, has more options and accessories allowing you to grow with the machine.
JP