difference between metal pedals

what the differece between expencive metal pedals with removable pins (70$) and cheap metal pedals with removeable pins(20$)??

Sometimes, nothing besides the brand name, but a lot of times it has to do with the metal that the pedals are made of. Some are better suited for different types of riding, also it depends on if they are sealed or unsealed. Sealed pedals generally will have a longer life span than unsealed pedals.

Also the main body fo a more expensive pedal wont strip as easily.