MercadoLibre (NASDAQ:MELI – Get Free Report) and PetMed Express (NASDAQ:PETS – Get Free Report) are both retail/wholesale companies, but which is the better investment? Get MercadoLibre alerts:Analyst RatingsThis is a summary of current ratings and recommmendations for MercadoLibre and PetMed Express, as reported by MarketBeat.com. Given MercadoLibre’s stronger consensus rating and higher possible upside, equities research analysts plainly believe MercadoLibre is more favorable than PetMed Express. ProfitabilityNet Margins Return on Equity Return on Assets MercadoLibre 8.52% 43.06% 7.57% PetMed Express N/A N/A N/ARisk & VolatilityThis table compares MercadoLibre and PetMed Express’ net margins, return on equity and return on assets. Comparatively, PetMed Express has a beta of 0.73, meaning that its stock price is 27% less volatile than the S&P 500.