Ofcourse your character's level and the random factor affect what you get in the caches, but is there anything else that has influence on the loot from a cache? For example, does it matter on what difficulty I complete the bounties? Does it matter on which difficulty I open them? Anything else?
For clarification, I'm talking about the reward you get from completing all bounties in one act in adventure mode. A new feature in the Reaper of Souls expansion. Upon completing all bounties in one act you get a one time use cache which drops some loot when used. It usually drops a few crafting materials, some rift keystone fragments and a couple of blues and yellow. I've had one legendary so far out of 4 or 5 caches.
I understand there isn't nearly enough data from the community yet to answer this question based on results. But if someone had a link to a blue post explaining this or perhaps an ingame reference that answers this, that would be awesome.
Damn it, I might just spend the next few evenings farming normal - T1 caches and see if I get significant differences in drops :D.