These are plenty close enough.
The actual parameter that matters is the bias on the 6922 - the voltage between grid and cathode. It should be a bit over 1.5 volts; this assures that there is no grid current, and hence that the grid impedance is high enough that it will not affect the equalization, nor will it contribute to distortion.
As the 6922 ages, its emission will decline, and the plate voltage will rise. It should be close to 70v, averaged over the lifetime of the tube - which is how the manufacturer's specifications were derived. The 70 volts is the same as the design plate voltage in a Seduction, where it is pretty common to find 55-60v with fresh tubes. (In Seduction you have the LED to assure the correct bias.) In Seduction, when the plate voltage rises to 90v the tube is worn out. In Eros, I'd check the bias voltage, and replace the tube when it drops below 1.2 volts - but first, I'd listen to a new tube, and keep the old one if it still sounds good.
I choose design parameters like voltage based on the specs of the tube, which are averages of many tubes as tested by the manufacturers - mostly many decades ago, of course. In the manual, we usually have voltages as measured on the prototype, with the particular tube we had at hand when the manual was written. But individual tubes do vary; that's why we specify an acceptable range.
