I'm struggling to find a real source, however glancing at nutritional facts of cricket powder, it appears that protein makes up 3/5ths of its mass, versus 1/4th for black beans.
I think you'd have to factor in the resource input required to create that mass of crickets vs beans/pulses/etc. I realize crickets are pretty efficient but they could end up being very similar. I also don't have good sources for this.
