An instance of a template on a window has a property called Template Path. You can change this property on a window dynamically, and it can be bound to anything that produces a valid template path.

For example, if there are two tank templates in a folder called Tanks, one template is called Tank A and the other is called Tank B. Each tank has a different look, but they have the same Custom properties. Their respective template paths are Tanks/Tank A and Tanks/Tank B. The template rendered on a window can swap between Tank A and Tank B by binding the template's property to any string reference that says Tanks/Tank A or Tanks/Tank B.