Key Takeaways StoneCo posted 27% higher net income and 22% ROE despite Brazil's challenging macro backdrop.Upstart's revenues jumped 102% as its AI-powered lending model drove a return to profitability.Valuation favors StoneCo, trading at a lower P/S multiple and outperforming UPST over three months.Fintech stocks have always captured investor imagination with their blend of technology innovation and financial disruption. Two names in the space, StoneCo (STNE) and Upstart (UPST) , are carving distinct paths ...