As I understand it they Are remakes. The Black Diamond are supposed to be the high grade remakes. I might buy a pair. At worst I could use them for playing Xbox 360/Xbox One games and save my Siemens Cca gray shields, and Reflektor Silver Shield 74's (from Rb2013) for music.
I have a pair of Black. Diamonds and after 200 + hour burn time, they sound very nice. But the Black Diamonds are not nearly as good ad the NOS Telefunken E88CC platinum tubes. I would say the BD's are a good scotch blend, but the NOS Telefunkens are fantastic, 50 year old single malt scotch. I use the Black Diamonds for playing my Xbox 360. And I use Gold Lions for everyday jam sessions . I only use the NOS Telefunken tubes for special listening sessions.