ReiNand supports all of those as well BTW. ARN tries to be a feature-rich CFW )i.e. built-in boot manager, gba/dsi patches, configuration menu, etc), while rei tries to be a minimalist n3ds-focused CFW.AuReiNand supports A9LH, as well as many other features such as o3ds and n3ds support, firm 0-1 protection (no accidental upgrades that will break cfw access) and region free.