Heroic Dungeons - Benefits?

"Brought in Heroic Dungeons from MW. These are only accessible by Noble Citizen accounts."

Can we receive more elaboration regarding the benefits of Heroic dungeons vs. regular dungeons? Better Loot? Different Loot Table? More Experience? Etc…? Thanks.

Harder/Higher level mobs as in the normal version of the Dungeion, more EXP, Higher Drop Rate for Rare Items. Certain high level rare items only drop in Heroic Dungeons.