The Points system:
Points are worked out based on the amount of kj and saturated fats each food contains. Each person is given a budget based on how many kj and how much saturated fat they should be consuming each day. kj are the measurement for the rate at which food burns (literally, they set it alight to figure this out). Fruit is worth Points.

The ProPoints system:
ProPoints are worked out based on the composition of the foods (ie, how they are made up and how our body processes and uses that energy). This is done looking at the Carbohydrates, Total fat, Fibre and Protien content of the food. This means foods that are used differently by our bodies, but which may contain the same kj, are given different values. People are generally able to eat MORE food under this program, with greater flexibility, and still expect the same kind of weight loss as under the old points system. The best thing about this ProPoints system is that FRESH fruit has no ProPoints: which means you will never have an excuse to go hungry.

The similarities:
You still need to track.
You still need to exercise, and can earn BONUS ProPoints based on this activity.
You still need to follow the Good Health Guidelines (ie, 2 x fruit, 5 x vege, 2-4 x dairy, 1-2 x protein, grains and cereals at every meal, etc).