Axe III's A/D Converter Scaling Parameters VS FM3's Input Pad?

[Ugly Bunny]

In order to help me with my other test of finding out why my FM3 and Axe Fx III sound different (slightly, but noticeably), I was wondering what setting I should set my Axe Fx III's A/D scaling to (for input 1) in order to best equate to what the FM3's input is set at (since it's not a parameter you can adjust on the FM3). Or, another way of asking this, what input scaling settings match the settings in the FM3's input pad? I assume a higher pad setting means a lower A/D scaling setting, correct? 0dB pad would mean 100 scaling, 6bB pad equals ??? scaling, 12, etc?

Thanks!

 

[FractalAudio]

Set it so you just barely light the red LED when strumming hard. Same on both units. The inputs are normalized so the exact value is irrelevant.