The only relevant differences are base defense vs stat requirements and that you should use a circlet(, coronet, tiara, diadem) instead of a regular helm because they have the ability to roll +skills and summon stats on top of your shrine bonus, as seen on the affix page Thank you for the quick ans...

Great guide, loving it so far, however there's one thing that's wrecking my mind here. In the Act 1-5 highlights section of Hell difficulty, we get this tip: "Collect rare sacred items you can use for crafting later (1 of each piece *can check the 115-120 section*)" That's all well and goo...