Gold or Platinum Grade of Tubes for BAT Preamp.

Hi, all. I am awaiting delivery of my BAT VK-33. I’m going to replace the 6 stock EH 6922s with the NOS Rocket Logo 6H23-EB, which is a direct replacement for the 6922. My tube vendor has gold grade or platinum grade (which is about $15 more per tube than the gold grade). Tolerances for matched gold grade are 15-20%, while the platinum tolerances are 10% or less. Given that these are small signal tubes, is the tighter tolerance of the platinium grade worth the $$? Is the BAT hard on tubes, thereby requiring the more expensive ones? Thanks for your help.
@petg60 ... Victor from BAT told me that the
6H30 is a direct replacement for the 6922.
You got me confused.

@petg60 ... my mistake ... I meant to say that the 6H23-EB is a direct replacement for the 6922. 
@rlb61 worries, 
Happy listening and experimentation.

So what's the story with the NOS Rocket Logo 6H23-EB? I'm curious because there tons of varieties of NOS 6922s and compatibles. There have been many articles and threads about the pros and cons on many of them. I've always had good luck with Amperex Bugle Boys (Holland) and I recall a number of folks raving about Tung Sol 7308s and others lusting for warm Mullards....but the 6H23-EB?
Is that guy @EBM  involved? If so, "jump on them asap". Cheers,
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