I think we should qualify the same driver statements. Same size and type, yes. The Grados taper where the tragus would press against cylindrical units of similar overall diameter if your unlucky about the fit and the gr10 is clearly a different driver than the GR8. Grado claims it's specifics are proprietary and I see no reason to doubt them. I recall KEF made 3 or 4 differend B200 8" woofers in the 70s that all had similar materials and #s but obviously weren't the same. Same supplier is very different from same unit. In this case Grado even claims different materials.
Fit and sound preferences will always be personal. I haven't heard an Orto so I certainly can't compare but I think Joker and Rawrster will have heard both in the next month or so. The E-Q5 looks like a real value winner and I think the fit would probably be fine for most, especially cable up.
Edited by goodvibes - 11/20/10 at 6:54am