Thanks , this helps a lot <| sep |> I don ' t really prefer one over the other because they are both good but here is some things about both of them . If I missed anything just let me know . Fit I prefer the x 7 because before I got the iPhone 7 I was using Westone and shure iems and these fit like those where they go around the ear and fill the bowl of my ear . Sound With sound the x 3 win because you can use the MySound app to tune them to any sound you like . I have been using the hi def audio preset on and they sound amazing . The x 7 s don ' t sound bad they have good bass and vocals are clear and not muffled like some earbuds I have tried . But with the app it makes the a little better . Battery The X 7 wins again . I have had them for about 23 weeks and I have only charged them twice even though I use them for about 23 hours a night . The x 3 don ' t have bad battery life as I only have charged them probably like 4 times since they came out and I have been using them 23 hours a day also since but he x 7 just last longer I feel like . So it ' s just a preference but if you have any more questions I will try to answer them .