Key Points SPYM and VOO track the same S&P 500 benchmark and deliver nearly identical performance and sector exposure. VOO commands far greater assets under management at $1.5 trillion compared to SPYM's $101.2 billion. Both funds have ultra-low expense ratios (SPYM at 0.02%, VOO at 0.03%) and yield the same payout at 1.1%, so yield is not a differentiator. These 10 stocks could mint the next wave of millionaires › SPDR Portfolio S&P 500 ETF (NYSEMKT:SPYM) and Vanguard S&P 500 ETF (NYSEMKT:VOO) b ...