Scenes first. One stays on your disk, one in the browser.
yWriter and DraftProse start from the same belief: a novel is a set of scenes you arrange, not one endless file, and tracking characters and locations alongside them helps. yWriter pioneered that for free, on the desktop, for writers who like to keep everything local.
DraftProse takes the scene-first structure into the browser. You sign in on any machine and the manuscript is there, with the same notion of scenes, chapters, and a character shelf, plus per-scene word counts and goals.