I don't know about current versions but having owned both I can assure you that Flitestar and Flitemap were definitely different as Flightstar used vector charts and flightmap used scanned images of paper charts, these were actually quite poor scans and the overlap between some maps was abysmal.
Memory map has much better scanned maps, but I still mainly use Flightstar for planning, although Skydemon looks just as good, actually probably better due to the notam overlay.