www.rehorror.com
PSM magazine reported that the PS2 version of RE4 will have new cutscenes, new weapons and new costumes not available on the GC version.
Of course, making the brilliant decision of revelaing this before the GC version is released means you are actually going to erode your own sales. It wouldn't surprise me either if, after the release of the PS2 version, we see an "RE4: Director's Cut" for the GC.