You need to be more specific, both Anker and Aukey are selling various types of cables. The prices are both competitive. The differences are in the range of $1-5. The choice is on the users. Anker seems to be more open about their cable information than Aukey, IMO.
Well, my personal preference has been always with Anker. Their products (especially the cables) are top-notch. But it is your choice in the end.