I have been having my masseters reduced with dysport for the last 3 years, my dosage is usually 50 units on the left, and 55 units on the right (uneven jaw). I am considering moving as the practitioner has changed and the results are less defined as they used to be. The alternative doctor uses botox, at double the cost per unit. Is there a difference in the potency? And will my dosage be the same between the brands? Thank you :)