The difference is the starting point.
The biblical creationist starts with the Genesis account.
The Intelligent Design scientist starts with an observation from nature.
What does an Intelligent Design scientist do with his observation?
Correct.
The Intelligent Design scientist starts with an observation from nature.
Wrong. There's no such thing as an intelligent design scientist. ID is a completely bogus pseudo science designed to sell books to dishonest radical fundamentalists who think they are sneaky enough to get superstition and myth taught in science class without real scientists ever noticing the difference.
The biblical creationist starts out assuming that the Genesis account is literally true.
The Intelligent Design scientist starts out assuming that the Genesis account is basically correct, albeit way too specific in its details to pass the Lemon Test.