We can already see that the light on either side is much smaller, with a much smaller white area like the hatch. The bumper is also new, with a more flat/smoother more aerodynamic trunk face. Which looks to be a cleaner more elegant design
^^^....if you look closely, it seems to have the same built in spoiler ridge that holds the break light. But it is a much cleaner more premium look and think Ford was going for the Baby Fusion look for the car. The cleaner lines will also make it look larger than what it is.