I guess in a sort of way, it would be nice if we could somehow measure the difference, lets face it, the motors are new, so we would expect them to start and run like new, right? but if you could estimate the difference in weight and what it does to the boat (like does it float mearurably lower/higher), is the boat so much beter to get onto the plane, or worse (or the same), fuel use and so on should be fairly easy to gauge, and so will speed, so it is the "funny" things that may be of interest (if you get what I mean)