How exactly does Clickie Gear Work?

[Matthalas Winterheart]

Hey All,

Was curious to know how gear with spells work? Specifically in question is something like "Elder Spiritist's Breastplate", now this is a spell that as a druid I get @ level 44. (Chloroplast)

So what is the difference between activating the spell from this chest piece vs my casting the spell from my spell bar? I notice alot of gear has these abilities, besides the stats that you are getting from said items, what is the benefit to the "Clickie Spells" exactly?

Thanks,

-Matthalas Winterheart
Druid of the 37th Circle