Explore how sector mix and company size shape the risk and diversification profiles of these two growth-focused ETFs.Vanguard S&P 500 Growth ETF (VOOG +0.16%) and iShares Russell 2000 Growth ETF (IWO 0.26%) differ sharply on cost, volatility, and portfolio makeup, with VOOG offering lower expenses and a tech tilt, while IWO brings broader diversification and small-cap growth exposure.VOOG tracks large-cap U.S. growth stocks in the S&P 500, making it a staple for investors seeking blue chip growth exposure. ...