The others have deghosting, but it is not selective. You choose the base frame and the program uses that frame. Automatic geghosting can work well in some situations, but the stronger the setting the more dynamic range is lost across the whole frame. With Photomatix it is possible to choose different areas of movement and use different frames. For instance maybe you have someone moving in a dark area, and leaves fluttering in a light area against the sky. You can circle the person moving and choose a lighter frame as the base frame (where the person is better exposed), and then circle the leaves and using a darker frame (where the sky isn't blown out). And the rest of the image isn't compromised.

This has freed me to do HDR where there is movement, which really opens up the possibilities. Like these: