Both lightbars are similar in that they include the Federal Signal proprietary SmartPod feature. Vision lightbars (both halogen and LED versions) also include a siren amplifier and control head, while the Smart Vector does not. The Vision lightbar package generates siren tones, controls auxiliary lighting, and operates the lightbar from a single included control head. Smart Vector would be the choice if you already have a standard switch controller and independent siren. However, the SmartPods do include a distinctive jogging feature that should be used with a momentary switch.