I have tried them both, if I remember right, the Creative version will only update with the creative patch. I purchased the GOTY version (after I got my SB Platinum 5.1), for the 2nd CD with the high rez textures and Unreal editor, and installed that version:
The intro always stuttered with the creative UT version, especially after the patch. I could never get OPenGL to work right either. GOTY version, even with the high rez textures, no stuttering/crackling and I run in OpenGl only and its very nice.
Your mileage may vary, and I've updated drivers since then, but I prefer the GOTY version.