Explore how two low-cost Vanguard ETFs differ in diversification, sector exposure, and risk profiles for growth-focused investors.The Vanguard Mega Cap Growth ETF (MGK +0.01%) and Vanguard Russell 1000 Growth ETF (VONG +0.01%) are both low-cost, passively managed funds from Vanguard focused on U.S. large-cap growth stocks. MGK focuses on the largest mega-cap names, while VONG tracks a broader index that encompasses a wider range of large-cap growth companies. Here’s how the two stack up for investors weighi ...