Specification Comparison for Various Geological Sensors

I require a comparison of seismographic sensors. Specifically I am looking for a comparison of Raspberry Shake models (RS1D, RS3D, RS4D, RBOOM, and RS&BOOM) to other commercially available sensors. This would encompass a one-to-one spec sheet comparison of all Raspberry Shake models to other seismographic capabilities you will identify. A special emphasis will be paid to sensitivity of these pieces of equipment and the methods by which they measure seismic activity.