Electrolysis is the only permanent hair removal that is proven to be permanent.
Laser technology is still in the development at the permanency varies from person to person.
But it seems like laser shoots the hair into sort of a stone age of development where the hair simpl needs very long time to recover or it does not recover at all. A lot of people start with laser because it is much cheaper and faster but then they switch over to electrolysis for the problem areas, white hair or regrown very "stubborn" hairs.
My cheeks are for example 99% clear after 7 sessions but the lips and chin still need some work.
The hairs around my nose are hard to get to and they will be most likely taken out by electrolysis