The rift has cameras that track your movement. That is the main difference that you are looking for. I've used the rift dk1 with extension cables and can actual

The rift has cameras that track your movement. That is the main difference that you are looking for. I've used the rift dk1 with extension cables and can actually move around quite freely, though obviously not as much as a wireless setup. With gearvr you can move around but the headset/game doesn't actually know you are moving around as there is no external tracker or reference point like with the rift.