At one point I used them both and didn't notice a lot of difference in there products as far as bubbles go. Stans may have been a bit lighter?? Never had them on a scale. I really had great service from them both. I have found a better selection from FGS for old canopy's for plans building and they have all been pretty good quality too. When Stan sold out I started using FGS but it was just to allow the new owners of Stans to get rolling. I have only been able to get ahold of them once though so I have refered people to FGS. Not sure what is going on but you have to pick up the phone to get orders.