How much lower is the "LOW SEAT" version?

I actually only need to know how much more it lowers my reach to the ground when sitting at a light. Some lower seats are wider, and don't really help you reach the ground better. I am inseam challenged, and cannot "flat-foot" on the stock seat. I also find the stock seat uncomfortable. I don't mind the height, except when on gravel, because my tip-toes don't have enough of a "footprint" for traction, and I'm always slipping whenever I am stopped on gravel.

I have to ride on gravel roads everyday, as well as stop. Will this seat improve my leg's reach to the ground? I'm thinking two inches should do it, but I don't want to lose any suspension travel by lowering the bike.