Having looked at this again, there are different XP rewards for different choices in quests. e.g. At the end of the lighthouse quest, if you send the troops back, then interrupt their story, you get 3,000 xp for claiming the glory, but 6,300 xp for letting them take it. This also triggers a trait bonus from each choice (and an achievement), which is kind of irritating.
This is the only dialogue one I've come across, however I've not reached the 2nd map.
Pulling up the quests via the editor will probably give you a larger list.
