This is mainly a practical trade‑off. The real‑world acoustic performance difference between the upper‑end Class B ( dB, e.g., HIGHKA) and the minimum Class A ( dB) is negligible for typical open‑plan applications — a 0.6 dB difference cannot be reliably perceived. However, trade‑offs in weight, cost, assembly speed and re‑locatability can be far more significant.