The Santoku is characterized by a severe drop-point blade. This enhances its ability to chop. It is great for it's purpose, and depending on the belly of the blade (how much curve the slicing edge has), can be used for both chopping, slicing, and mincing chores.
The main disadvantage of the santoku style blade is that you can't use it for applications that require a small or pointed tip, such as removing the stem from tomatoes or strawberries. The my ten-inch chef's knife is overkill for that job, I can to everything that the santoku does, plus remove the stems from feggies, and fruits, carve with good precision, and a host of other things, all with the same knife. I don't need so many specialty knives. The classic chef's knife, with the point dropped in line with the handle center-line, is the most versatile knife on the plant.
Again, the Santoku is a good knife. My youngest son, the professional cook, prefers the santoku. We have the same brand of high-end kife. He used to have several professional quality knives but has replaced them with just the one. I used to use several knives as well, in my home. But except for when I'm filleting a fish, or boning a ham or roast, I use the chef's knife exclusively.
Seeeeeya; Goodweed of North