  This paper investigates the use of decentralised control architectures with
heterogeneous dynamics for improving performance in large-scale systems. Our
focus is on two well-known decentralised approaches; the 'predecessor
following' and 'bidirectional architectures' for vehicle platooning. The
former, utilising homogeneous control dynamics, is known to face exponential
growth in disturbance amplification throughout the platoon, resulting in poor
scalability properties. We demonstrate that by incorporating heterogeneous
control system dynamics, this limitation disappears entirely, even under
bandwidth constraints. Furthermore, we reveal that introducing heterogeneity in
the bidirectional architecture allows the platoon's behaviour to be rendered
independent of its length, allowing for highly scalable performance.
