Understand the key differences between RSP and SPY, two ETFs offering S&P 500 exposure through different weighting methods. Discover how equal weighting, market-cap weighting, mega-cap concentration, fees, liquidity, volatility, and market conditions can influence performance, plus what investors should consider when comparing RSP, SPY, VOO, and IVV. https://financenovels.com/blog/rsp-vs-spy/