Teck Resources Ltd (NYSE: TECK) lays claim to being the largest diversified miner in Canada. But its roughly $12 billion market cap pales in comparison to mining industry giant BHP Billiton Limited (NYSE: BHP), one of the largest diversified miners in the world with an over $100 billion market cap. That difference, however, doesn’t make BHP the better investment, here’s why you might prefer the smaller of this pair.