Both the Wells Fargo Reflect® Card and the Discover it® Miles card offer no annual fee and generous introductory APR periods. If you're seeking the longest possible break from interest on purchases or balance transfers, the Wells Fargo Reflect card is the better choice with its 21-month 0% introductory APR.
However, if earning rewards on every purchase is equally important, the Discover it Miles card is compelling with its 1.5 miles per dollar spent and unique first-year miles match.