[SSDan]

This is a generalization to help explain - not meant to be an exacting technical answer. The higher the lift (the 6xx numbers - opens the valves further) and/ or the duration ( the 2xx numbers - how long the valves are open in degrees) the more agressive ( more peak HP, the higher in the rpm band the power curve is , the greater likelyhood of low speed drivability issues) the cam tends to be. A good tuner can bend within reason any aftermarket cam's performance to tame some of the drivability concerns, give more lope at idle, maximize peak performance - etc.