I say: Neither.
Simply because designers often like to exploit or exaggerate the garment to get some shock value and to get the "fresh look".
Plus they dislike the reality of the garment's use.
In this case: Islamic clothes are suppose to cover/protect the wearer's awrah, not put the awrah on display.
The hijab, the nijab and the burqa are not "sexy" garments.
They are not meant to be worn with the bare minimal of clothes.
They not meant to be worn to make the wearer "sexy".
Sorry to be a killjoy here however designers focus on putting the awrah on display.
That's why models often look like pieces of art in order to display a purse or a blouse while showing legs or whatever is bare. Muslim fashion designers often fall into the same rut yet it's worse because they KNOW that the wearer's awrah is on display but they promote it anyway.