It's my understanding that the Ibanez/Maxon AF-9 are a different circuit.
Also, sonically speaking, this is how I understand these pedals:
MuTron > Perhaps these clones > QTron+ (similar circuit) > Ibanez/Maxon > Bassballs and Nano > Haz MuTron
Perhaps I'm wrong.
"Learn as if you were to live forever; live as if you were to die tomorrow."