Paying more for branded one doesnt mean it's the best. Sometimes the non branded ca be as good as branded one. I have 3M tint (RM2k) done in my old car and a no branded one (RM500) in my other car. Surprisingly the cheaper one is very good. I cant say about the durability of the tint but currently, performance wise it's similar if not better.

Interesting tidbits, my cheap tint is done is a very dubious tint shop run by one guy(no other staff) for around 10 years. I suspect it's a money laundering place for ahlongs. That said, he did a pretty good job and according to my other friends who have their tints done there, after 3 years their RM300 tint is just as good as new. His tint films are devoid of any brands and when tested with other expensive film samples, it rejects heat as good as the RM3+k tints. It even reject heat better than the 3M on my car.