To me a basic bow is the bow that we all learn to do like a figure 8.
A twisted bow is the one "we twist".
A boutique bow is any elaborated bow. It could be a basic bow with spikes, a layered bow, a twisted boutique bow, etc.
The name boutique is just to make it sound like it is unique...it came from a boutique, like boutique clothes. They are not really boutique to me but customs. People call them boutique. This is my opinion.