OK, I'll bite, but with very little data. After reading as many reviews as possible, I bought them based on one review (there's not much around, as you know) linked from the SE site that was about an orchestral taping session--which is the type of music I'm interested in recording--in which they apparently did well enough.
I doubt they're parallel to C4s--they cost a bit more, and only have one cap, not a choice of two, so either the C4 is a much better deal, or a lesser microphone.
The reason I've kept my mouth shut is that I don't really know what I'm talking about, having nothing to compare them with. They're better than what else I have, but that's to be expected, since that's an MXL990, various sets of tiny-cap electrets, and a Behringer ECM8000. I can't compare them with anything good. So far I'm happy, except for the high-end response bump, which I could live without.
Sorry--that's all I've got.