A more attractive valuation and impressive operational performance make this stock a better buy than its morefamous peer. ExxonMobil (XOM -0.64%) is a fine and worthy dividend-stock candidate for investors looking for exposure to oil, but it doesn't trade at Devon Energy's (DVN -0.45%) cash-flow valuation. Moreover, while ExxonMobil's stock is up almost 19% this year, Devon's stock is flat this year and presents an excellent value for investors. Here's why. Devon Energy continues to progress Devon Energy's ...