I think the question is a straight forward one and simply answered if we don't overthink it.
We have two knitting needles (or ice picks if you prefer) of .200" diameter. Being knitting needles, both taper to a point. On one the radius at the point is .016" on the other .062". Given equal pressure behind them which will penetrate the barrier of flesh (or whatever soft material) first?
It will be the one with the smaller radius, the sharper tip.
Take our same needles, ice picks this time and made of identical steel with the same radii at the tips. Given the job of an ice pick- to be stabbed at high velocity into a frozen mass of ice and so break it up into smaller portions_ which radius will be better.
It will be the larger-heavy duty-radius. It will tend to resist deformation longer and still be pointy enough for the job.
(Of course you can always toss a towel over the mass of ice and break it up with a hammer, which would be easy. But a real knife guy wouldn't do that, they would take a folder and beat on the end of it with a hammer to drive it into the block to break up the ice, make a video of it and then debate for 10 pages which lock is strongest based on their ice breaking up test.)
So the use to which you intend to put a tool should determine the qualities of it's construction (the length of blade, type of steel, grind, width, etc.). The latter can also be markers to the purposes of a knife and it's role.
Looking at a knife tells you more about how it should be used than it's name. If a knife is called "The Military" it does not mean it can dig ditches, or do what a 6" Ka-bar did in Korea.
A Besh wedge, or American grind tanto, will not penetrate as easily as other blade types. But it is heck-a-hard to break the tip on a Buck Bravo.
tipoc