I'll add my results when mine arrive finally on Friday :doh:.
FTI uses TDK's original technology and materials to continue to manufacture both the 4x TDKBLD-RBB disc and the 6x TDKBLD-RBD disc designs that TDK chose to cease producing in Japan in favor of selling Ritek and MBI made BD-R in their spindles. Better profit margins for TDK, I'm sure.
I'm anxious to compare these FTI-made Digistors to my FTI-made SmartBlu 6x 25GB. I did get higher LDC/BIS numbers w/ the 6x vs the 4x SmartBlu. But I also factor in the Stiftung Warentest results that place the 6x TDK disc at the top of the pack for quality/longevity above even 6x Panasonic and 6x Verbatim 25GB.
Never had a problem with playback on the 6x SmartBlu.