Ok.. Let's wait for Varley's impression. If he agrees with your two about the different, warm and full sound signature (and I mean full, not big), I would accept that I'm not audiophille enough to make further critical notes on earphones.
Buy the way, Varley and the others, I hope you had properly amped your RE0's (you know.. Fiio7, Teclast T51 / Sflo2 / HiFiMan 601 etc stuff..) . On hifiman for instance, the big difference I do hear between these two comes from wider GR07 stage .. The rest is just too subtle to focus on and call it a different signature..
Relax, everyone has a different set of ears after all. "Audiophiles" here disagree with each other all the time!
And yes, I have amped and unamped both IEMs. But yes, I do agree that GR07's soundstage is outstanding for a non-vented earphone... so, it isn't a surprise that will be the most outstanding difference between the GR07 and RE-ZERO (can't say for the RE-0, I never heard THAT one).
Edited by MaxwellDemon - 7/4/11 at 7:57pm