This paper provides a comparative analysis of two classical control strategies applied to a grid-connected voltage-source converter with an L-type filter. The first method employs a cascade control structure with proportional–integral controllers, while the second uses a full-state feedback controller designed via the linear quadratic regulator method. A linearized state-space model of the converter, in-cluding controller and modulation delays, is developed and consistently used for both control schemes to enable a fair comparison. The control approaches are evaluated through detailed numerical simulations under identical operating conditions, including grid voltage dis-turbances, load changes, and reference variations. Performance is assessed based on transient response, disturbance rejection, control effort, robustness to parameter changes, and stability margins. Disk margin analysis offers a conservative, comprehensive evaluation of closed-loop stability. The results show that, although both strategies attain similar settling times, the full-state feedback controller of-fers superior disturbance rejection, reduced peak currents, and notably larger stability margins. The paper aims to provide practical in-sights and guidelines for selecting suitable control strategies for power electronic systems.