Quote Originally Posted by Neko_Yanagi View Post
Concerning Different Caps:

I'm still trying to get the quest in Limsa to work for me after I have done Uldah, but it doesn't want to work yet (it's been more than 24 hrs) BUT there are different hats in the dat files. Yellow Gremlin has them all listed. links below.

Egg Caps

Archon Eggs

Hope this might help. If anyone know HOW to get these other hats, PLEASE let us know!
I've already gone quests in both Ul'dah and LL and they give the same hat. I can also confirm that you only get the achievement for completing the quest in one city.