Well, I've done some comparisons between a US Nissan site and a major parts company in the US, Rockauto.com. Using this link to refer to part code "51010," which they call the "member assembly-1st cross," Rockauto shows it fitting 2005-2009 Pathfinder and 2007-2015 Xterra, which seems kind of odd because one would think that the earlier Xterra would be a fit as well and taking into account that the US went to the extended noise in 2008. Further searching does confirm, however, that they used a different part number on the Xterra up to March, 2007, and they use a different part number on the Pathfinder starting September, 2008. So, take that information for what it's worth!
https://www.nissanpartsdeal.com/parts/n ... &Filter=()
Now on the next part diagram, referring to part code "62242," called the "retainer-front," it is specific to 2005-2007 Pathfinders, meaning the part changed when they extended the nose in 2008 models:
https://www.nissanpartsdeal.com/parts/n ... &Filter=()
Rockauto also shows that the bumper mounting brackets, the parts that extend from the frame to the bumper support member, are also specific to the 2008-2012 models; the Nissan site confirms those same parts are different on the 2005-2007 models.
So, I don't know if this information helps you or gives you more questions! It looks at least like there were some specific changes to certain parts other than the bumper cover/grille/headlights when they went to the extended nose design.