You can quickly tell that the snow one is the original one and the woods one is the fake one by doing a simple Error Level Analysis (top) and a Luminance Gradient comparison (bottom).
In the picture with the woods, look at how the Error Level around the windows is significantly higher (brighter) than the rest of the picture, and how the outside clearly has a "grid-like" compression method, differently from the inside of the house. This indicate that it's a composition of two pictures edited into one.
Also, look at how the Luminance Gradient of the outside is significantly different from the inside, having small shallower bumps while the inside has deeper, greater bumps.
It's a clear composition of images.