In that vein, two popular choices among patient investors are the Vanguard S&P 500 ETF ( NYSEARCA:VOO) and the Vanguard Total Stock Market Index Fund ETF ( NYSEARCA:VTI). For minimal management fees and reliable dividends, you won't do much better than these two Vanguard funds. I'd call VOO and VTI smart-money picks, but which one is smarter for folks seeking long-term returns?