That's odd. I thought nearly the entire mids and treble were too recessed, which corresponds with
the measurements. (Note how most of the raw measurements are significantly below the compensation curves instead of aligning with them.) The highs did not sound harsh to me at all. (Perhaps it was due to a bad fit for you?) I thought the FSP sounded too bassy and dark. The MT220 is quite a bit brighter than the FSP. To my ears, the MT220 has even stronger bass, yet somehow manages to sound a lot more neutral, though that's probably because the upper frequencies aren't as recessed. I agree about the "shouty" quality of the FSP's mids, but that's a common phenomenon in headphones, especially closed ones.