Does the loot from a Horadric Cache vary (in quality or frequency) depending on the difficulty level where you obtain it, or open it? No. Blizzard explains Horadric Cache legendary drop rules:
Sorry, just wanted to clarify something. You’re very clear about the loot in the cache not changing based on the difficulty. I take that to mean that the loot table does not change.
However, does the “chance” that you’ll get a legendary from that fixed loot table increase with each torment level? For example. Am I just as likely to get a Ring of Royal Grandeur (a cache specific item) from a T1 cache as I am from a T6 cache?
Grimiku: That’s a great observation, but more of an oversight on my part rather than precise, selective messaging. The chance to get a Legendary item from a Horadric Cache does not change based on the difficulty you acquired the cache. To use the example provided you’d have the same chance to get the Ring of Royal Grandeur from a cache acquired in Torment 1 as one acquired in Torment 6.
Two other common Bounty Bag questions.
Q: Does the gear roll when the bag is found, or opened?
A: The level of the gear and the act the bag was earned in is set when Tyrael hands it over, but the actual items roll their stats when the bag is opened. This is why it used to be possible to get Imperial gems from Normal difficulty bags if you opened them in T6. The items in the bag will be at the level of the char who found them. For instance, opening bags found by a lvl 70 DH with your level 60 WD will get you WD-themed items (INT on the mainstat, lots of WD helms and knives, etc) but all the items will be level 70, and all the gems will be Marquise. This means you can cross-class farm a bit with bounty bags; the opening class will get more appropriate items for their class and the mainstat will usually roll correctly.
Q: Which legendary items can only be found from Horadric Caches?
A: There are 20 legendary items that can only be found from Horadric Caches, and they are arranged by acts. We’ve got a full listing in the Diablowiki.net article, with their special legendary properties, for easy reference. Here’s a quick list:
No legendary items are specially tied to Act Four Caches, but bounty bags earned in that act can contain the special legendary items from any of the other acts.
I don’t have that list memorized (yet), and every time I look at it I get a moment of, “oh yeah, I scored that one helm/boots/cloak and didn’t realize it was cache-only.” I’ve found cache-only items from every act, despite never split-farming them intensively (not since the beta, at least) but never the Act 1 Ring or the Act 2 Gloves that are the most useful/sought after.
Because RNG! Ever a cruel mistress.
Update: Nevalistis posted some more info about Cache contents and when/how they are determined.
I did bounties with my low level barb and opened them with my 70 wizard. The gear that dropped had int, but was the level of my barb.
Nevalistis: As I mentioned, such coincidences can occur, but should generally be rare. I did experience something similar earlier today, just to check and make sure for myself. A cache obtained by my 70 Wizard gave my 60 Barbarian a set of level 70 shoulders with Strength, but the next cache I gave to my 60 Demon Hunter gave her a level 70 wand with Intelligence.
It would take hundreds of tests to be absolutely certain on an individual level. Luckily, that’s something our Quality Assurance team has already been thoroughly over. Items found within should be dependent on the Horadric Cache’s acquirer if they roll smart loot, and the Difficulty in which they are acquired or opened should have no bearing on the loot produced.
I can’t say for certain, but all the evidence I’ve seen agrees with the second poster, and disagrees with Nevalistis. As I said higher up in this post, I recently opened 8 bags, all found by lvl 70 barb and DH, with my lvl 60 WD. And every item was level 70, and almost every item had INT as the stat. Plus there were 3 WD helms and a ceremonial dagger, but zero hand xbows, mighty weapons or belts, etc.
I’d love to know for sure, so if you guys have done some testing share the results in comments, but as far as I can tell/test, 1) cache items set their Act of origin and level when they are spawned, but 2) the actual items and their stats are rolled when you open the cache, and smart drop for the class that opens them.