Does Remote Controlled cars have differential mechanism?

Hi am an ECE final year student and i am doing a project on Autonomous Parallel Car Parking
and am using an RC car for this purpose. I wanted the project to be more applicable to real time systems so the RC car needs to be more like a real time car. What i want to know is whether RC cars makes use of a differential. By differential i mean the mechanism to drive a pair of wheels with equal torque while allowing them to rotate at different speeds.

Thanks for any replies.. 😀