The movie continuity gave us different styles of sub-grouping between the factions. The Autobots it more of a team based thing with a small set of individuals. Twins- Skids and Mudflap Wreckers- Leadfoot, Roadbuster, Topspin The Decepticons its more of masses of clones. Constructicons Dreads There are also those with classified functions. Guardian- Bumblebee as protector of Sam. Seeker- Oldest Decepticons given the mission to search for the Matrix of Leadership like Jetfire. Devastator and Arcee sisters are a different thing as both have multiple components but a single consciousness.