Hehe. That's another common myth that I see all too often in these forums--that there exists an ultimate best disc type named Taiyo Yuden. Just like other media, TY media has its good batches and its bad batches. Just like other media, TY media has its A-grade and its B-grade. And just like other media, how TY media burns depends on the quality of the batch that you have and how much your particular drive (because, like T02 discs, not all drives of the same model are made equal) and your particular firmware likes it. Just because it's Taiyo Yuden doesn't make the media divine and exempt from things like variability.
Look, a CMC MAG E01 disc can outperform a YUDEN000 T02 disc given the right circumstances (and actually, I have a batch of such discs that's doing just that right now).
Just like not all Ritek media is bad, not all TY media is golden. Ritek media just tend to be worse and TY media tend to be better. But that's all that you can say. If you ever see anyone saying with absoluteness that TY is good and Ritek/CMC are bad, then they don't really know what they're talking about.
If I'm not mistaken, unlabeled T02 media, which is what rima.com sells, usually tend to be their "B" batches. That may well be the cause of your problem. Does your drive burn other media fine? If so, then your TY discs are bad.