The golden grail (makes armour gold coloured, adds 10% value) was originally DLC for D:OS included in the retail version of the Divinity Anthology. It was added to the Collector's Edition of the game, so is at least in any kickstarter tier with a digital or physical CE.
The Source Hunter DLC is essentially an upgrade from a regular edition to digital CE version (other than the CE having 2 copies of the game and the Steam CE also including copy of DD and BD).
