What's better, a Timex or a Rolex? If your intent is to tell what the time is, probably not a whole lot. Your question is kind of philosophical, if they both give the same results, "probably not a whole lot". I'm using the HC-SR04's and quite happy with the results as well. It's a puzzle as to the pricing structure on some of this stuff. Which boils down to whether you want to 'shop around', if you have no time constraint.
