Which one is better, I know it costs more for the Formula One and they come with a lifetime warranty.

 

I'm very happy with 3M, same warranty.

 

I have both and they are both excellent tints. If I were to choose on I prefer the 3M, side by side the 3M is a truer gray color where the Formula One has a little more blue/green color. Optically they the 3M is a little clearer.

 

I have used 3M for 10yr's, no bubbles and lifetime warranty. That's what sold me.

 

I have the Formula 1 and have been using it since 1986 and love it, I have installed on 5 cars over the years and only had one issue back in 1989, which was resolved quickly