I think forest is a beta and huertgen the final version; Same map though, but different versions... I'll check the changelogs if I can find one or two, thanks for quick reply!

Edit:
Quote Originally Posted by 1944 Huertgen Changelog
1944_huertgen.pk3:
This version has received extensive bug testing to ensure gameplay & visual perfection.


Spawn points fixed
Alternate routes to Axis AT Gun
Ceiling raised (no more disappearing grenades)
lots more hidden features
I was right, both are finals but the Huertgen version is a fixed one.