Hey guys, on the console character stat screen, what do the shield/sword/plus icons with the green and red arrows mean? Specifically differences between what the amount of arrows means?
In theory, the amount of increase or decrease in damage/health/life recovery that the given item has in comparison to what you have equipped in the similar slot at present.
In practice and particularly at level 70 end game builds, it can be misleading, particularly if you are trying to shoot for specific affixes. Where you're at, though, you can generally believe what the arrows say.
What makes the arrows misleading at that point:
Attacks - The game will account the comparison DPS figures on the basis of your APS (attacks per second). This means that with any two given items, one with an Increased Attack Speed increase will show a green arrow compared to one that is otherwise exactly similar but without the IAS. The issue here is that there are only so many given skills the players use which actually are performed as quickly as your APS value dictates. A main example of this are "pets" (Witch Doctor summons, Demon Hunter turrets) which attack at their own rate of speed. A Pet WD with 2 APS and 300K base damage will show 600K damage in the summary screen, but a Pet WD with 1 APS and 400K base damage will actually inflict more damage with the pets.
Defense - The game values Vitality much more highly than it does either element affixes (which includes Resist All) or armor, when the priority should really be on resistances before vitality. Vitality merely affects the raw value of your life bar, while armor and resists dictate what numeric value of damage is actually inflicted upon you. Given that the main way in which players gain life is through Life On Hit, which is also a static numeric value, it becomes all the more important to make your LOH as effective as possible, which therefore means that you should seek to make quantity of damage you incur as small as possible.
Sustain - This is the most misleading value, as the game attempts to make some kind of mass singular amount here on the basis of some sort of equation which accounts for all means in which you regain life. This means that it takes your Life On Hit value, Life on Kill value, and Increased Health from Potions value, and combines it into some kind of magical singular number. Logically, since you are not actually killing individual monsters nor using potions nearly as often as you are hitting enemies, this value fails to accurately convey how effective you are at recovering life.