Investors are comparing two S&P 500 exchange-traded funds, VOO and RSP, to determine which one is a better investment. Some reports suggest that RSP, which is an equal-weighted ETF, may have advantages over VOO, although the reasons for this are not entirely clear. The relative merits of the two funds are being debated, with some outlets presenting scenarios in which RSP outperforms VOO, while others weigh the pros and cons of each investment.