This miner has a much more diverse set of end-market demand drivers for its key metal.In many ways, lithium miner Albemarle (ALB -6.79%) and copper miner Freeport-McMoRan (FCX -6.59%) have a lot in common. Both are beneficiaries of the growth of electric vehicles, and both are mining metals that could rise in price due to an imbalance of demand over supply. That said, Freeport McMoRan is a better stock to buy. Here's why.Albemarle and Freeport-McMoRanThere's no debate over why the market has gotten excited ...