the compact has smaller wheel all round, plus only 1mm or so of ground clearance, as opposed to the earlier model’s 2.5 odd mm clearance. SBCG haev the ability to swap out front knuckles without the removal of a certain pcb lid and unscrewing. Range on the newer ones seems to be abit less, and from experience they have a glitch with causes the last function sent to the controller to be “remembered”, if you will; if you were turning and released the left/right but still held forward, it would still turn. And yes, range seems to be less than average. For Compact/BCG specific nfo you’ll have to go back through these forums a ways… Bring em with you tonight, btw…