Complex sentence: Both versions feature a steering wheel and a gear shifter for low and high gears, but the environmental/cockpit cabinet featured both an accelerator and a brake pedal, while the standard upright one only featured an accelerator pedal.
Split into simpler sentences: Both versions feature a steering wheel and a gear shifter for low and high gears. The environmental/cockpit cabinet featured both an accelerator and brake pedal, while the upright cabinet had only an accelerator pedal.