Dream boxes are entirely different. There are 7 new units put into a box with just over 1300 units. The lower star units are put in with more quantity, and the 6* and 7* units are have 1 each. You are not guaranteed anything other than x random units from the list that have not already been pulled by you. And with the set unit counts, you are guaranteed to eventually get all 1300-some units, but that will cost thousands. Many have done that though.