I don't think there is a big difference between them. Any UV cured nail polish (both Shellac and Gel or Gellish) will stay on for at least 2 weeks. I can get mine to stay on for 4 or 5 weeks if I use cuticle oil regularly and put a clear coat over the gel at 2 and 4 weeks.
I love this stuff because my nails grow a lot and once you take it off, your nails aren't damaged. I will use for my wedding day and probably get a french manicure.
Re: Nails
I love this stuff because my nails grow a lot and once you take it off, your nails aren't damaged. I will use for my wedding day and probably get a french manicure.
Hope this helps!