CD/DVD Speed help

Hello Everyone, I have recently done some scans and would like some opinions on which scans are best.

I used two different types of media and 2 separate ways of recording the media:

Verbatim Test 1 8x Duplicator
Verbatim Test 2 8x PC

Datawrite Test 1 8x Duplicator
Datawrite Test 2 8x PC

I would like peoples opinions of which scan is best for the 2 types of media

Thanks, this will be a great help to me.