The scans above are for the same brand (Philips) but two different CDs. The 2nd set of scans were burnt with the Pio but still read back with PIF errors. It didn't read back with any errors in the LG drive.

I some more scans with other CDs that I have. They didn't produce any different results(still has C2 errors) except for one brand eProperformance(Prodisc).

I tried it with 5 pressed CD-ROMs and it read them without any C1/C2 errors, but the maximum speed was only 25x.

These are the scans for
BenQ
ePropformance
FujiFilm
kHyperMedia

The LG scans ontop and the PIO below incase the name of the burning isn't showing.