Close-up of logo for mobile payments company Paypal on paper, against a light wooden surface (Photo by Smith Collection/Gado/Getty Images)Getty ImagesPayPal remains a dominant player in digital payments, but its growth has cooled while competitors continue to expand. Comparing PayPal’s valuation and fundamentals with those of Fiserv (FI) highlights an interesting contrast that could influence investors’ next move.FI is PayPal’s competitor in the Transaction & Payment Processing Services sector that offers:1 ...