I cannot think of a product more closely related to the challenges of choosing a loudspeaker than that of the microphone.
Both microphones and loudspeakers are hardly flat transducers. In fact, if you get close to anywhere near a few dB within a reasonable band of frequencies you're doing amazingly well.
Where an electronic circuit is capable of heading down into the basement of low frequencies, sometimes in the vicinity of fractions of a Hertz, microphones and speakers struggle to go much below 20Hz and rarely much higher than 30kHz.
And then there's the sound quality issue. Compare a Neuman condenser microphone to an AKG version. Both have the same size capsule, made from the same materials and basic construction techniques but they sound like night and day compared to each other.
Of course, an aspen loudspeaker versus a KEF or a Focal—they are not close.
We make transducer choices based on what we hear and what we like, not on their specs or builds.
