At the constraints you provided (same size) the whole notion of "better" is extremely subjective. Small speakers can only reproduce a certain range of frequencies (think of it like trying to make 10 m high waves with a spatula) so they will all produce "colored" sound i.e. distort the signal. People perceive some coloration as being better than another and Bose's technology is all about making their coloration pleasant for most people. However, "most" is not "all" and some people don't like their coloration. Not to mention that any set of big speakers produces orders of magnitude less coloration.