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Help me decipher these testing figures on NOS tubes?

Hi

Just wondering what the figures for tests on tubes represent, and what are good figures?

Below I have two examples of testing figures for matched pair tubes. Which are the better performing tubes, and why?

1. Tested : 13.5/11.8-12.4/11.2 7LC delta 0C1

13.1/11.4-12.5/11.4 7LG delta OC1

2. Tested : 9.8/9.8-9.5/9.5 7xx delta9A2

2 simultaneous recordings

Hi all,

I am asked to do recording with one single microphone but with 2 different criteria. Essentially, my task is to record the microphone at 8-bit and 11.025kHz for on the fly internet transimission purpose. At the same time, it's also crucial to record through the same microphone at 16-bit and 22.05kHz on the local machine for another purpose.