Point noted - I stay away from subs. Space, crossovers, etc. My point about the differences goes beyond subs and bass reproduction it's just about how the speakers play as a whole. I'm not arguing that the m3 isn't a better speaker and can be tuned with subs and ancillary gear to bring out some more performance in areas where the listener sees fit...instead, i'm arguing that depending on a listener's musical tastes what they enjoy, given an unlimited budget they may still be better off with the cheaper of the two speakers (in this case the s5 mk2) and more money spent elsewhere on their rigs. a good brand, imo, offers products for a variety of buyers as opposed to just scaled back versions of a top model. that's just my view on it.
in the excerpt below, alon talks about handling between a 911 and cayman. i think of it a bit differently and more for use cases. given an unlimited budget, i could see someone who has no interest in track driving buying a cayman as a car to whip around in daily. but i don't drive so i'll stay out of the car analogies
Here is an excerpt from the TAS interview I mentioned earlier:
So the S Series isn’t just “Q-lite”?
To me, the idea of just “reducing” is not good enough. I always try to give something to whatever model it is, no matter how much “less expensive” (I don’t want to say “cheap,” because none of them are), so that they can stand up for themselves. I think about Porsche. The Cayman—the mid-engine—is not a 911. But it handles better, even though it is cheaper. It’s not a 911, which is what a Porsche is supposed to be, but you always kind of feel: “Hey, you know what? My car handles better than yours!” I like to spread the love as much as possible.
Little to disagree here, you make your point eloquently. One small detail regarding the second sentence in your post: Just like you apparently do, I prefer the least amount of crossovers. I don't do crossovers with subs. I never would have a crossover from my main speakers, too much (danger of) sonic compromise. My JL Audio subs have a low-pass filter by which they simply come in below a certain frequency. My main speakers (monitors) play as they are, in parallel with the subs.