Those versions of her are able to destroy both artifacts and enchantments, which black cant do, but its highly dependent on the metagame whether this comes into play at any point
As far as I can tell, there's no difference in rewards between the two, it's just a tacit acknowledgement that you're up against opponents who'll probably know their stuff, or not
This is the only copy in existence to achieve a BGS 10 "Pristine" grade (POP 1), making it a flawless relic
Rather than try to win the game as quickly as possible, a control deck will want to slow down the pace of the game while it accumulates incremental advantages each turn
Hexproof became the more popular keyword because it allows the person controlling the card to target it with spells and abilities while blocking those of opponents
Its static ability of shutting down additional draws single-handedly stopped many infinite combos and generic abilities from functioning