The GS-13 is quite similar to the GS-11 and is a sister knife to it. The GS-13 has very slight serrations along the edge of the blade. Not as pronouned as a fully serrated blade, we find that these small serrations actually work really well with fruit that has a firm skin, but watery centre where you do not want the contents to go flying everywhere! The serrated blade is able to saw through the skin while keeping a very clean cut. We feel that this works particularly well with tomatoes, plums, nectarines and grapes. The knife is a utility knife though and can be used for most kitchen tasks.