Hunters (DoW/DoM), Miners, Botanists, and Fishers all can get different items, with the exception of Quick Ventures, which are the same across all of them and just bring back random items. All DoW and DoM are equivalent.
Ideally, I would suggest picking one based on what you want them to get for you. There are lists of what they can all gather on various sites.
If it's too much of a pain picking one, I wouldn't worry too much about it; they all have pretty good stuff you can gather.
