Creationism requires deities. ID does not.
That's a claim that is often used by ID people to try and avoid being labeled as creationism.
Technically, ID and creationism both require the exact same thing - an unknown* conscious operator to plan things out. Creationists call it God and thus connect this operator to their particular religious mindset. ID doesn't specifically name the operator as anything else but operator, but there is little or no difference when you consider the difference between "God" and "operator" in terms of what they were supposedly doing or did long time ago.
There is no functional difference as far as biology is concerned.
Thus it's arguable that both the Intelligent Designer and God are essentially the same thing (again, functionally as far as biology is concerned). The God of Gaps. Perhaps an apt name in Olympian style would be "Orifices"?
Creationists also attribute a lot of other things to God, but when making comparisions with ID, that is of no consequence.
I think the biggest claimed difference between Intelligent Designer and God is that ID people claim the Designer to be a natural occurrence, just "unknown" as of now. Creationists offer God as a supernatural explanation. But in closer inspection, this difference can be broken down by showing that there is no such thing as "supernatural" apart from the nice creepy word used to introduce unnecessary mysticism to the matters.
Supernatural does not (and can not) exist, because all that is part of universe is natural. Thus, if God is part of universe, God is a natural phenomenon, not supernatural (regardless of God's attributes, whatever they would be). Also, being part of universe can be defined by whether or not something affects the universe or not. Thus, if God affects universe, God is part of universe and thus a natural phenomenon. If God doesn't affect the universe... well, there's no problem because in effect, God does'nt then exist in the universe.
Thus, if God isn't supernatural, we have this from the ID people:
-a naturally occurring intelligent (and thus apparently conscious*) operator that essentially planned life as we see it (or alternatively some stuff about Boromir and Faramir and Stewards of Gondor and how other beings have degenerated from them, or something like that)
And in comparision, we have this from Creationists:
*a conscious (and to some extent, intelligent) being who designed and lo behold, even made life as we see it (and some extra like all the extinct ones)
*a natural occurrence, because everything in the universe is just that
*all the other attributes from religious context - almighty, all-seeing, the old stuff.
They just call it God.
The only difference I can see between God and Designer is the huge amount of attributes associated with God, from religious context. But as far as biology and origin of species is concerned, there is no effective difference between the two. Or, at least I can't see it. If someone can point any obvious faults in my deduction, please be my guest.
