the disc is perfect. No scratches or something.
Rip-Speed was set on 12x
I don't skip the SS files, I always dump the whole disc (in XBC and Schtrom)
I used "MD5 Calculator" to calculate the md5 sum of the files.
I dumped the game again with XBC and as result I got a different md5 sum, so I got two different dumps from the same game made by XBC ... and I didn't chang the options in XBC - same options like on the first dump
Where are they different [...]
Uhmm, I don't know. I can't compare the two dumps with a Hexeditor
Same with Schtrom ... dumped one game two times - got a different md5 hash