Septa is a kind of band that play with music. I mean, these guys re-forge their style in almost every release. "What if we do this, and what if that.."
They aren't scared to play some part a bit longer. Or to manipulate one even riff in plenty ways, so it sounds fresh till the end of the song.
I would say, their music gains one distinct sign, when you hear it for the first time, and you don't get it. You would need some time. And ones you hear it - that's it.