Shared engineering but different designs for me. And red Bumblebee and yellow Cliffjumper became Roadwise (FUNCTION: wandering scholar. Rarely at the Ark, preferring to learn about Earth culture) and Backfire (FUNCTION: Sentry. A coward by nature, insists on staying at the Ark - all the time - far, far inside the Ark - "You can't find me"!), respectively, for my headcanon.