Any sim that uses a "plausible" reality over actually mapping the real scenery will never be real enough to me. I run P3Dv4 with ORBX, and every major landmark, roadway, and the general architecture look and feel of a geographical area is captured. X-plane does some high detail areas well, but even those have random autogen buildings and roads that do not represent real life so it's just a (good-looking) imaginary city surrounding the airport with random non-existent neighborhoods everywhere. That is the main reason X-plane didn't stick with me, that and the virtual cockpit layouts and systems never seemed as realistic to me and the aircraft can absorb far too hard of a landing which takes away from the flight dynamics IMO.Plus the default airports(with exceptions of major airports X-plane took the time to do well), are very barren. Real taxiway and runway layouts for most, sure, but almost no buildings and they look nothing like real life. P3D I feel does a much better job with these, and simple freeware add-ons can transform default airports into something much more realistic en-mass.
X-plane is also a lot more difficult to mod and has way less 3rd party freeware options, even though it has grown in popularity, the users seem to just stick to the default sim and buy a few payware add-ons more so than modifying the sim itself into something different the way P3D/FSX users tend to do in much larger numbers. I've been involved for a few years in the retro AI community for FSX/P3D where people have produced AI models for most historic aircraft, liveries, and backdated scenery. I don't want to fly a Western 737-200 into the current Denver airport and see globe tailed United jets, I want to fly it into Denver Stapleton and see what aircraft would have been there at the time based on actual flight schedules and representative flightplans for the charter/cargo airlines based on history. Really ads to the immersion and is my level of nerdy. Right now I'm finishing up a Japan 1998 project, it's really awesome to fly something like Narita to Kai Tak and see everything the way it would have been.
And here is a 1994-96 SJC scenery I've been working on a few minutes per year for a while...lol.