Whuch is the best brand for dresses?
I don’t know that there is an answer to that. It will depend on your budget, the lady’s preferences for style, etc. I am, however, pretty sure that you’re unlikely to get many helpful replies on a technical forum predominantly used by men. 
As @TechnoBear; indicated, this is not an appropriate forum for discussion of clothing. And fashion is quite a personal preference that also varies by geographic region.
Closing this thread