Well, out of curiousity, I have been using the eq5 and Ety ER4P/S the last few days.
- The Ortofon eq5 does everything well with no apparent weaknesses. They are organic & balanced with some of the most natural mids I have heard from any IEM/headphone.
- The Etymotic ER4 (amped or unamped) is thin, uninvolving & uncomfortable. I understand why they would be popular for professionals, as the coloration is minimal. However, for everyday listening, there are many, many better choices. The soundstage is nonexistent and the deep seal is outdated.
I prefer the overall sound of the Ortofon eq5 over all of these - IE8, ER4P/S, Atrio MG7, Monster Turbine pro series, RE272, UM3x & SE535. As stated above, they have no weakness, the others listed all have a significant flaw.
I am not that surprised with the results, Ortofon has been catering to audiophiles for decades (they have been in business ~100 years), and I know multiple people that swear by their TT carts.