Whats the actual difference between a clipless pedal with a steel body and one with an aluminum body? Is it really just about the weight, or are there other factors at play here? I see some steel-bodied pedals are actually lighter than their aluminum counterparts, so that cant be the only thing to consider. Are steel-bodied pedals more durable, or do they just look more rugged? And what about the impact on pedal engagement and release - does the material make a difference there? Is one better suited to certain types of riding or terrain? Ive seen some high-end pedals with aluminum bodies and some entry-level ones with steel, so its hard to tell whats actually important here. What are the actual benefits and drawbacks of each, and is there a clear choice between the two?