I have owned both..It really depends on your needs..
The lightweight is a full size knife at 3 oz. and carries like a much smaller knife. My lightweight fits nicely into my rotation when I know it's going to be an occasional easy day..It is not a hard use knife.. the steel ROLLS easy but touches up easy..Both are great knives. If I had to only have one with nothing else, then its easy.. S30V. If your at a place where you can place it in a line up with other knives, then the lightweight is an awesome choice.