Today is my lucky day guys! I somehow managed to receive both my KZ ED3 and ZSE on the same day, despite ordering them on significantly different time periods Both sound amazing for the price, but you know what guys? I don't think I enjoyed the earphones as much as I enjoyed receiving the new KZ starline eartips bundled with the KZ ZSE. That's right, call me crazy but the starline tips were the main highlight of my purchase These starline tips are MAGIC!!!!! They literally make every single one of my IEMs sound sooooo fricking good!!!! It turned my lifeless KZ HDS3 into something more energetic, and it greatly reduced sibilance in many of my IEMs. Based off the differences that I am hearing between these starline tips vs regular KZ tips, I can roughly tell that they do a great job at reducing high-mid to lower-treble frequencies (where harshness happens most of the time), while surprisingly enhancing the upper high frequencies.at the same time. When I used the starline tips on my ED9 (brass-filters), the results were absolutely outstanding. Matched with the foam filter mod I did, it completely remedied the ED9's lower treble problems while further adding more detail into the upper highs, making the overall sound of the ED9 to be less upfront, and more backstage. For once, it actually genuinely felt as if sound was coming from outside/the environment rather than from the earphones. Everything was so detailed and spacious. Overall it made my ED9 sound more natural and realistic. Anyone who has the ED9 and has the starline tips surely needs to try this out. Don't ever use the starline tips on the ATE though, as the ATE shines through its mids and enhancing its treble and upper treble just makes it sound harsh. ______________________________________________________________________________________________________________________________________________ Quick Summary of ZSE: Nice tight punchy bass, full detailed mids (especially regarding lower mids), and a very well peaked treble (sounds like it's peaked around 8khz, just my best guess). The open back makes for a spacious soundstage but as a result subdues the sub-bass. Quick Summary of ED3: Nice boomy sub-bass and mid-bass, good mids but are slightly recessed, and a very bright yet inoffensive treble. The inoffensiveness is probably because there is no significant sharp peaks in the high-mids to low-treble whatsoever. I would actually prefer the ED3 over the ZSE if I'm listening to EDM. This sound signature is best suited for the focus on low-level detail and further emphasizing them for you to directly engage. Definitely the oppose of realistic sound production, with less emphasis on background and more emphasis on foreground.