Not surprised that Optical Quantum found some of the worst quality CMCMAG-DI6 to sell to you :a. Some folks have had decent luck with those from other brands. Its not an easy choice between the TY and JCVs. I strongly doubt you would see any coasters with either one. Both are burning good in the Lite-ons.
On the one hand, you have good burning TYs in original packaging with unknown longevity.
On the other hand, you have good burning Pannys that are repacked with serious longevity claims from Panasonic.
Your call . On the up side, I don't think there's a bad choice here :).