All good then.
Afaik the RPM is the exact same deal as the RBI but with a frequency shifter on the mids. Or not, somebody will know for sure.
Yep, parametric mid knob, but no presence control. The RPM has a different gain structure as well. More gain on tap, but not really musical beyond 12:00 IMO.
I prefer the EQ section of the RPM for the mid control, but I like the way the gain knob responds better on the RBI.