First off, I am absolutely not claiming that Honda speakers sound better than pioneer or any other brand in general just because they are superior in quality or technologically advance. I am just saying that they sound more pronounced on those mounts because they are light, they fit perfectly and they complement the front identical speakers in such a way that overall output seems to be better.
Secondly, I don't know about your civic / corolla or any other car for that matter but people who are getting genuine fitting in their City without altering a thing/or poking a hole must be luckier than me like I said I am not an audiophile, I don't know much about audio and stuff, my suggestion is truly based on my personal experience and first hand information that I obtained from the installer on Hall Road.
If you think of yourself more knowledgeable/informative, please do enlighten us by taking a kind look at Honda genuine speakers and Pioneer speakers, their respective connectors and overall design and suggest us a good pair of after market speakers that would just fit on with a single screw on the mount without peeling the wires to make connections and above all would give you an Ear Orgasm which Honda Speakers are incapable of.
If you cant come up with such a practical suggestion, save your hypothetical claims for another discussion. TY!