I've heard the latest iteration of Mr. Speakers T50RP mod (which are a marked improvement and sound nothing like the early iterations), but under extremely poor conditions, even for a meet. I don't have measurements for it, so take my comments with grain of salt. Mr. Speakers T50TP mod doesn't aim for the absolute reference neutrality thing - it has rather a nicely shaped frequency response which is more fun sounding than the Paradox. However, it's still within the range of normalcy: it's not wonky, it doesn't have any odd frequency response abnormalities, etc. In other words, it doesn't have the "FAIL" label which I am so willing to attribute to the majority of headphones or IEM(s) which I have heard. In fact, it's actually quite good.
LFF's Paradox s/n 001 sound like a neutral reference which is a slight hair dark (actually hits the bullseye in terms of my personal preference.) The production Paradox are actually more neutral than s/n 001 (actually hard to tell between them.) I'm very partial to neutral sounding (getting more and more cranky to anything that's not as I get older). But you don't have to believe me, just see Tyll's contest results.
Disclaimer: I know both Mr. Speakers and LFF personally. They have come over to my place where I've performed measurements and shared measurement techniques with them.
Edited by purrin - 5/2/12 at 2:21pm