I think that some salons actually use Wella hair products because they are salon quality products. It would not really make much of a difference, so if you find Wella to be less expensive than go for it.
dont try any brand untill two to three months becouse if you do your hair might be burn or fall my friend try it and her hair fall after the three months you can start any type of brands you want but for my advice wella is the best