No, see, there is where you are wrong.
creationism, as you say, is dependant on a X-factor. If you remove the creator from creationism, nothing is left. And again, as this creator is not proven to exist creationism fails from a scientific viewpoint.
Evolution on the other hand is NOT based on a X-factor. A deeply believing christian can himself repeat all the experiments, one evidence leading to another.
That is science strenght, the same results WILL show no matter if it is a christian, atheist, buddhist, daoist, muslim or whatever who repeats the experiments.
As an example, my personal belief or knowledge tells me mind reading exists, as I have witnessed things in my life that lead me, personally, to this conclusion. I can try to convince you too. However, I would NEVER say it's scientificly proven that mind reading exists just because I think/know so, as I can't have you repeat the same things I have been through.
It does not mean I am unsure about mind reading, it just means I can not prove it scientificly.
In my example, I believe science one day will reach the same conclusion I did, that mind reading to in fact exist.
And if YOU are sure God exists, then why oppose science? IF God exists, i am sure science will come to that conclusion sooner or later. As it seems today though, there is no evidence of a God, or a creator.
Did this make it more clear?
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