TY owns most of JVC's media business. For whatever reason, they stopped selling media under their own brand and decided to sell them under JVC. To make a long story short, the discs are the same.
I wouldn't bother with the archival grade stuff. These discs typically use a gold reflective layer and special dyes that, under certain conditions, give them a storage life of like 100 years. It's not really worth the money for everyday stuff or even relatively short term backups.
"Blu-ray is just a bag of hurt." - Steve Jobs