Two consumer staples ETFs with very different approaches. Here's how to decide which one might suit your portfolio. The State Street Consumer Staples Select Sector SPDR ETF (XLP 0.59%) stands out for its rock-bottom expense ratio and deep liquidity, while the Invesco S&P 500 Equal Weight Consumer Staples ETF (RSPS 0.56%) offers a different weighting method for sector exposure.Both XLP and RSPS focus on U.S. consumer staples stocks, but XLP tracks the largest companies by market cap, while RSPS gives each ho ...