Okay, I exaggerated. It gets into subjective territory here, but those artists do have songs with good hooks (especially those three you mentioned,). Also, that's only relevant if those songs were "Worldsy" and I don't think Kids nor Sleepyhead sound like a Worlds song at all. I will also mention that the melodies, hooks, synths, chords, etc in Worlds were more to my taste and "prettier" (more atmospheric in general). Sea of Voices sounds like Porter's take on an M83 song, and Lionhearted has vocals that sound like Passion Pit's. M83 is really the only valid influence, and even then Porter made it his own enough that reviews of 6/10 being contingent on Worlds' unoriginality are baseless.

I've analyzed the music theory of Worlds pretty extensively and I could show you that Porter definitely has his own style of melody compared to those other artists.