Softness of the adhesive is different.
Extra type is made of harder adhesive and Mild type is made of softer adhesive.
If you prefer hard and sharp touch, Extra type is recommended. If you prefer soft and flexible touch, Mild type is recommended.
There’s no difference in lasting power and holding strength. They are both strong water and sweat resistance.
Easily make deep and natural crease on eyelids. 0.09mm ultra-thin tape is invisible when applied and will stay inside the crease all day long.