Greetings GarfieldModular!

Yes, you are right. The A/B switch will toggle between Moog Ladder and S&K resonance characteristic.
The top switch is for the variable highpass (to thin out the low frequencies from the incoming signal, if needed).
And yes, I'm one of the co-founders of IOI.

Thanks for your wishes. I'm sure we will find our path the one or the other way.. ;)

Regards, zid aka Frank