Since its early days selling a white card reader that plugged into an iPhone, Block (NYSE: XYZ) has evolved into a comprehensive financial services provider for both merchants and consumers. Its shares were once a darling on Wall Street. But they now trade 74% below their peak (as of Oct. 1).

(NYSE: MA) has long been a dominant player in the payments landscape. Investors have been rewarded, as shares are up an incredible 12,320% since the company's initial public offering in 2006.

Between Block and Mastercard, which is the better fintech stock to buy right now?

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Source Fool.com