sena 30k vs 50s

What is the difference between these models? These units are a step up above the 30k but I’ll outline first what’s different between the Sena 50S and Sena 50R. Interface Sena 50S uses Sena’s classic circular dial to navigate through the headset menus. Sena 50R uses a 3 button system to navigate instead of the circular dial Included Accessories psg vs al nasser