Well, one way to look at it is that iems are often used outside or on commute. So, it's valid to say that in real-world usage one earphone competes well with another, as long as the context is made clear to the reader. Not every comparison has to be alone in a silent, dark room, fondling audio equipment.
One issue I can see though is that people may not have had much time with the re-600 at the audio store event you guys attended. The worst/funniest example is the dude from earphonesolutions giving an incoherent "review" of the Shure se846 having heard them for 3 minutes (plus bad comparisons with other earphones!).
I just speak in incoherent riddles sometimes but the bolded section was what I was actually trying to work towards. And what people do in the silent darkness of their own rooms is perfectly fine with me.
The considerate ones of us definitely were aware that there were others waiting for a chance to listen and listening was pretty brief, unfortunately.