Is there a rule of thumb for what improvement in vector cutting a buyer can expect (speed at which you can cut or how deep you can cut) for a given increase in laser tube wattage assuming you hold all other things equal and are using comparable quality tubes and power supplies? Maybe cutting speed is the more accurate measure since cutting depth will be limited by the lens' depth of field characteristics? In other words, how much faster can you expect to cut the same type of acrylic using the same power level if you move from a 40w laser tube to an 80w laser tube? 25%? 50%? Or?

Thanks.