While JPMorgan Chase (JPM 0.15%) has Jamie Dimon, one of the sharpest men in banking, as its CEO, Citigroup's (C -1.09%) performance in the stress tests surprised many, and may put it squarely on the comeback trail. So which of these two monster banks is the better buy today? In this video, Motley Fool financials analysts Matt Koppenheffer and David Hanson give their views on which of these two they would prefer to have in their portfolio.