From my use, and testing, the secondary point where the two edges meet (yokote), gives an advantage for a quick snap cut.
It penetrates better through material than a curved belly.
I've tried it my self through cardboard, and clothing multiple layers.
Once, I tested this type of cut with an American tanto point first with a factory transition, then with the secondary point sharpened to be more round. I took a bit off the transition to make it rounder. It affected the penetration on snap cuts, to a significant degree.
Further, penetration on a snap cut where the belly made contact on a traditional (non Tanto point) verses a Tanto point was amazingly inferior.
The secondary point creates a significant advantage in this area.
Now, I'm not a knife fighter. I have no knife combat experience. But I've used and slashed, and cut and stabbed with a lot of knives.
Daggers, swords, axes, hawks, pole arms, spears, throwing knives, and many blunt/crushing weapons. I was pretty surprised when I did a test with "Americanized tanto" shapes.
Does that make them better combat knives? Eh... I've never "combated" anyone with one.
But, I'd say they snap cut on a quick tip attack better than the same length blade knife without that secondary point.
I have a few CS tanto designs. In carry and use, I have used the Tanto point for scraping gaskets, stickers, and many other uses.
I had a co worker force a lock on his car with an old Recon1 back when the ultra lock was standard. He also, later, cut through sheet metal on the side of his old car to get to the busted locking mechanism. (Snowboarding, and he did not want to have to drive back down the mountain with a busted window.
I'm not sure a clip point or drop point would have had enough tip strength to do the prying he did both times. Took a bit of time to restore the edges when I sharpened it for him.
