Amy & Brian's calls their product "coconut juice," but it's no different from coconut water. It's just a matter of nomenclature (in Thailand, where it's bottled, coconut water translates literally as "coconut juice"). Their coconut water has the characteristic sweet nutty flavor of Thai coconut varieties, though not quite as sweet or nutty as Harmless Harvest. It's a very refreshing can that's also available in pulpy varieties with little tender nubs of coconut floating around.
You might notice that Amy & Brian's comes in two cans: 17.5-ounce steel cans and 10-ounce aluminum cans. The two products are not identical! The smaller cans contain water from a sweeter variety of coconuts than the larger cans, so if you want that extra sweetness, it's worth seeking out the small cans.