Step aside, MacBook Pro: two of the leading contenders for the most-powerful 15-inch laptop of 2018 are in the Windows world. Those would be Dell's new XPS 15 and Microsoft's second-generation model of the Surface Book. The notebooks offer huge horsepower thanks in part to their speedy Intel CPUs -- with up to six cores in some cases -- while also boasting discrete graphics from Nvidia. If you're in the market for a 15-inch laptop with a lot of horsepower, which of these two is a better fit for you? What follows is our comparison of the new Dell XPS 15 vs. the Microsoft Surface Book 2 on specs and price.