Even though the above two images are composited using the same source photos, they are very different. The left was made using an automatic program called HDR, and the right was made using my more labor intensive method that I use when you buy my premium package.
Notice how the colors are different on the left; the lights are all very orange and yellow and when you look out the window everything is discolored and blue. Also, notice how dark the window panes are and how the poorly lit areas, like under the armrest on the couch, are much darker.
Also, take note that the image on the right has a fire in the fireplace, digitally put into place.