I have both the standard 4S11 and the 4S11G. I also have the "G" and non-G versions of the L-4E6S interconnect..
In my experience the "G" versions are significantly better than the non-"G" versions. The non-G cables are adequate, but a little lightweight and unfocussed sounding. The G is more accurate, more tonally correct, has slightly greater weight and better resolution. It is not a massive difference, but it is definitely noticeable.
These are very good cables and a bargain at their price. I can think of some much more expensive high end cables that I do not think are as good. To be clear, there are certainly better cables out there, but these are extremely good, well balanced, natural sounding cables at a very fair price, and I suspect many people (ncluding me) could live very happily with them.