Yes there is a significant difference. Starting with the ATE, it's a nice phone, nice enough th have 2 pair but I primarily use the for sports and yard work. They're comfortable easy to drive, easy to use but I find that the are a little veiled. The Zn1's on the other hand have a larger sound stage and better detail. They are much harder to drive amd to wear. Now a little explination, I love my Havi b3p1's sound signature so bought Zn1's in lookjng for a kz in that range over time it necame very close. But the amp/eq doesn't lend itself to all around use. Bought the Zs1's hoping to find that signature in something easier to use. Tips can be an issue finally found what worked for me. But lots of effort and time but they sound very nice with a similar sound to the Zn1's the difference being ( something I probably wouldn't notice if I didn't use the Havi's and Zn1's daily) is that the have what I can knly describe as thinner sound. it's all there jhst not quite as rich as the Zn1's which aren't quite as rich as the Havi's. The Zn's I describe as 90 to 95% of the Havi's the Zs are 90% of the Zn1's. So yes the sounds better than the ATE they're just hard to get right and for me not a simple throw em on and go but for $12 they're very good they just don't fit that "use everywhere anytime that the ATE and the Havi's ( Havi's are to nice ok and expensive, for some situations) So if you can swing it get both, I think you'll enjoy the Zs mkre but use the ATE more often. Sorry for the length of the answer.