Ally version of Delicate Blood Garnet is better. (atleast on tooltip ingame, horde one shows 5agi)
Actually 2 different item ids.
Ally: https://www.wowhead.com/item=28361/delicate-blood-garnet 7agi
Horde: https://www.wowhead.com/item=28360/delicate-blood-garnet 5agi