I hate lumping bands together but I really don't see any difference in sound between any of those bands. They all just sound the same and I'm sure it's not just to me because I've tried picking out differences and SOMETIMES I can tell which band it is but they all just seem to have one guy to scream, one to sing, needlessly obscure song titles and cliched lyrics.
-AC
could say that about loads of genres tho.... Death, Black and all the other obscure types of metal for instance.
Vocals and to a lesser extent Guitar styles vary between those bands, and Atreyu arent aactually Screamo. Glassjaw are nothing really like the others, theyve got a distinct sound. Only really the top 4 fit ur description, and the similarities are noticeable but then again so are the differences.
and Personally i prefer Alexis to all of them, as you may have noticed
EDIT: and as for the song titles, theyre quite good some of the time, in a lengthy sort've way - a decent read compared to some titles bands come up with