I've only used Inskscape once but I would say that Draw is for basic work when you need to embed a graphic in another document (mostly text document) and be able to edit it later if needed (add/move shapes, text boxes, ...).
Inkscape is more to design complex graphics to be embedded as they are afterward.
Haven't you found any review of Inkscape on the web?
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AOO 4.1.2 on Xubuntu 15.10 (Wily Werewolf) and PortableApps port 4.1.2 on Windows 7