CD BURN vs. CD

What do you mean? Is it an image you're running off from the hard drive using something like Virtual Daemon? or are you just saying that there is no speed difference between a copied game compared to the original? If its just a properly copied game it should perform the same as the original, but an image (ISO) is different, much faster and more convienent (if you have the storage space that is) 'cause there is no mounting time (spin up time) and you in general would get faster performance. Try to clarify what you mean.