VCD is simply video data on a plain CD. So...
- Unlike DVD's, CD's do not have dual layers. The dual layer adds sensitivity to data reads.
- DVD data are packed more densely in order to achieve the 4.9GB per layer vs CD's 800MB (= 0.79 GB, which is about 1/6.5 as dense as a DVD). This adds to sensitivity of data read.
- The laser beam for a DVD is much narrower in order to read the more dense DVD's, which is even more affected by the surface of the disc if it is rough or scratched.
So yes, DVD is more vulnerable to mistreated surfaces than a VCD.