Is there? How strong? Out of that $100 how much of extra weeks of usage will I get and with what confidence level? Also - Is it affected by the level of hardne

Is there? How strong? Out of that $100 how much of extra weeks of usage will I get and with what confidence level? Also - Is it affected by the level of hardness in the local water and my patterns of usage ajd types of detergent I use? Does additional reliability affect any other parameters like energy and water usage? In a multi-variable comparison like this it is impossible to say much about future past 5 years with much certainty, while the price is single biggest objective metric.