On the issue of Ipodlounge's reviews of the UE10Pro and the UE5c -- they were in fact reviewed by two different people. Jeremy Horowitz reviewed the UE10Pro, and Dennis Lloyd the UE5c. So we still can't draw any definitive comparative conclusions between them.
HRA has heard the UE10Pro and the UE5Pro -- not the UE5c. Both the UE5Pro and UE5c have the same drivers but they are tuned differently. Presumably the UE5Pro has a more forward midrange consistent with its intended use by pro musicians.
So I believe the only living soul who's heard both the UE10Pro and the UE5c is Jerry at UE. Since one is a lot more expensive than the other, and therefore more profitable to UE, I take his recommendation of the cheaper model for recorded music as a ringing endorsement. The UE10Pro is probably better in an absolute sense, of course -- three drivers vs two -- but it remains to be seen if it is $400 better for those of us who are not musicians. Since I am not a profesional singer (and even gave up air guitar some years ago
) I had no problem deciding that the UE5c was probably a better choice for my purposes -- $400 better!