If you avoid TY's Value Line media, all TY OEM, unbranded and That's brand media is about the same quality. According to koba, the first discs of TY's batches go to drive manufacturers and Sony PlayStation developers, then OEM (Plextor, Verbatim, Panasonic, TDK, Fuji) and unbranded discs are made, and after that That's media is made. TY's batches are much smaller than other manufacturers' batches (like Ritek) are, so this isn't making such a big difference.
If you avoid European Verbatim Pearl White media, everything is okay.
Verbatims (the Advanced Azo+ ones) are made by CMC, Prodisc, Moser Baer and Taiyo Yuden.
Usually Made in Taiwan (CMC or Prodisc) Verbatims are most consistent. The cakebox will tell you whether it is CMC or Prodisc. CMC is using serif fonts for their cakeboxes.
Moser Baer India's quality is varying, but it is not as bad as it used to be.
TYs in Verbatim packaging are rare and could only be bought in Europe when they were available, so forget about it.
The climatic stability of Verbatim discs overall is slightly better than TY DVD+R discs and much better than TY DVD-R discs. TY doesn't have LightScribe media, only printable media though...