Danncy Pure Vanilla Extract From Mexico 33oz Each 2 Plastic Bottle Lot Sealed

Does Danncy brand Pure vanilla extract contain coumarin?

why the different spellings of "vanilla"?

does one of these bottles have a flip top cap - i previously threw out my white bottle not realizing that the dark bottle only had a twist on cap

Is there any difference between the taste of the clear vs the dark. Is there perhaps coloring added to the dark which is the only real difference ?