Creationism is a "top down" approach. God created the earth and heavens in 7 days.
ID is supposed to be a "bottom up" approach by saying x,y and z are highly complex, yet fairly ordered, there is no rational explanation for that order, so there must be something guiding (a creator).
Different directions to try and explain the same thing.
In the end, they get to the same place. There is a God. At least, according to them.