SGP:
Soft Adhesive Film, not reusable, harder to install
POWER SUPPORT:
Hard non-adhesive film, resusable and removable, very easy to install (you get as many chances as you want).
CONCLUSION:
I have a very hard time believing SGP's soft film can even be on the same planet as far as "glass like" appearance and feel as Power Support's hard film. I'm not saying SGP is a bad adhesive film, because it isn't. In fact it is the best adhesive film out there...but these types of films don't do it for me.