Agreed, I said what I said only because the subjective type may hear a warmer sound from the red and a more detailed sound from the blue. That's if they search and found what had been reported by some users, and/or the manufacturer. We both know how humans are prone to hear what they have been told to hear/expect.
If I have nothing better to spend money on I wouldn't mind getting a blue one to try, again just because it is so easy, but won't likely do it until the red is worn, just like you suggested..