From my experience, there is a 20-30% difference in income from one model to the next.
The chart below is not in in weekly or annual dollars. You should think of it as payment for a given piece of work.
Model I 100
Model II 120-130
Model IV 130-175
Model III 175 – 200
Model V 200- 250
Model VI Difficult to Estimate
It is important to note that risk increases in exactly the same order. Career decisions should not be made based solely upon potential income.