Quick Fix 4.0 vs. 5.7?

Is there a difference between Quick Fix 4.0 and 5.7? I bought a bottle of 4.0 about a year and a half ago to use in case I got hit with a random at my old job, and thankfully never did, but now I have this bottle left and I am wondering if its still good. What is the difference, and will it ever expire?

The little slip of paper in the box will have a manufacturers date on it. QF is usually good for up to 2 years. I think I would pickup a new bottle, its reaching the end of its life.