This is actually our inside chart, we shared with some folks who asked about wood. It will be posted on the web-site... Sometime. It is based on several people's subjective listening tests, done in our office, and then averaged. To a certain extent, I think yes. But do not forget that cup geometry a driver specifications will have a large affect on that too. We have plenty FA-002w cups in stock, and they works just fine for 003Ti, so we will continue to sell them.