DDump vs CdManipulator: different dump

[RetroGamer]

I was trying to dump a SafeDisc CD but it happened a strange case:
I dumped the disc in two different pcs (... so 2 different drives), in one pc i dumped with CdManipulator and in the other one with DDump. Normally i get matching dumps but in this case, the dumps differ in 1 sector...
After resizing the bigger one it matched the smaller, so the doubt is if there is a way to check the real size of the disc in order to know wich dump is the correct...

Thanks

[ssjkakaroto]

What about DIC?

[Jackal]

Yeah, about time that you get a plextor like everyone else

If one of the 2 images has fewer cdmage errors then the one with more errors must be wrong