1.
Sugar doesn't contain resins

vs

Resins in wax can can cause allergic reactions

2.
Sugaring results in sparser, finer regrowth with each service because it removes hair from the root. When scheduled every 4 weeks, damage to the hair follicles is even more likely, which means even less hair will grow back 

vs

Waxing is more likely to break hairs at the surface causing painful ingrown hairs and "prickly" discomfort as the hairs grow back

3.
Sugar doesn't adhere to live skin cells

vs

Wax adheres to live skin cells, increasing the likelihood of skin tearing