I have a Mini Torii.  The specs on the website says it has a 1 volt input voltage using a 12AT7 tube, the manual says it has a 1 volt input sensitivity using the stock 12AU7 tube.  I'm assuming the different gains of these two tubes would have an impact on the input sensitivity, so is one of these statements not right?

I'm looking for the input sensitivity of this amp with 12AU7, 12AT7 and 12AX7.  I'm looking into biamping with another amp that has an input sensitivity of 1.3 volts and it would be helpful to know this info to work out how to match them best.

Thanks for any input.