Depends on what you want. X-plane can look quite nice if you invest in scenery from e.g. Orbx. I think they just announced southern California; which looks pretty nice. I use Ortho4xp to generate my own scenery. And for Europe there's simheaven.com with detailed 3d scenery generated from open street maps and other sources.
Obviously the new MS sim goes beyond that in level of detail as they have better data and the know how to post process that. I suspect, X-plane 12 might try to close the gap a little again and of course the flight model is where X-plane shines traditionally, which for a lot of pilots is a reason to prefer this simulator.
Obviously the new MS sim goes beyond that in level of detail as they have better data and the know how to post process that. I suspect, X-plane 12 might try to close the gap a little again and of course the flight model is where X-plane shines traditionally, which for a lot of pilots is a reason to prefer this simulator.