Why do some of the Redken All Soft shampoo bottles look different?

I want to buy the Redken all soft shampoo and conditioner but i don't get why some of the all soft shampoo bottles look different from others. for example some are gold and some are a clear dark brown.Why do some of the Redken All Soft shampoo bottles look different?
I use Redken myself and theres a difference between the bottles. The dark brown kind of golden one is the one I use and its SMOOTH DOWN. The lighter tannish brown one is ALL SOFT. Those are really the only two ones that have close names and colors. All the other redken bottles are blue and red. If youre looking for all soft its more like a regular brown bottle and not gold. Go for the clear dark brown =)Why do some of the Redken All Soft shampoo bottles look different?
The Clear Dark Brown = Shampoo


The Gold = Conditioner





or the other way around hehe.