DVD/CD drive audio extraction: not the same

I ripped some music from an audio CD using my LiteOn SOHW-812S DVD drive and repeated the process using my LiteOn-52327S CD-RW drive. In both cases, I extracted the files using Exact Audio Copy, with maximum precision (and slowest speed). Exact Audio Copy’s logs reported no errors in the extraction process in either case.

I then compared the resulting files from either process. They were different. Why is this the case, and is it important?

Which version, the one ripped using the DVD drive, or the CD drive, is “better”? :confused:

(Not quite sure which forum to put this under!)

If there is no audible difference then either one should be fine.