Are the group dungeons in the Undaunted Daily pledge completely new instances each time, or are they always the same? And are they identic to the regular veteran/non-veteran versions of the same dungeons?

(I.e. if you take a veteran pledge, and get sent to e.g. Fungal Grotto - will it then be the same as the 'regular' Fungal Grotto, and offer you the chance of the quest associated with vet Fungal Grotto at the same time, allowing you to hit two flies in one blow, so to speak? or are they completely different from each other?)