I'm just basing everything on first impressions. What I can say is that I can already tell they have stronger bass potential over the M2C's and the box that the Tingo's came in with its lining made a better impression over the cheap box that the blox's came in. Like BloodyPenguin said, there's something not quite right with vocals and the mids are recessed......there's a slight echo with voices. Don't know what he's using for sound equipment, but I've always ran all my earbuds as a base line using a sansa clip+ running rockbox.
Have used everything from Yuin Pk1's and Pk3's to Sennheiser MX580's and wasn't wow'd right out of the start with any of of them....maybe was with the Pk1's when amped, so I'll have to put some hours on these before saying anything further, but so far the Blox's sound much better and more balanced to my ears.