What the Hoover family does to be successful, is more likely a combination of many things unrelated to this subject. Right?
And even if you were to discard all the actions a competitor takes to actually represent competition, to imply it comes down to mere sizing technique, there still remains no credible evidence of it.
After all, maybe the Hoovers can and will do better still.
Maybe they do well despite their sizing techniques.
Maybe you don't even know what they do, and how they do it, and with what & why.
It's kind of silly to create a NS-ONLY -vs- FL sizing contest, for a question there currently is no answer to.
Hell, if it were really a contest, then both could very well lose.
Now, if someone proved, through some chambered laser technique, etc, that one point in case sizing provides better bullet alignment with a qualified bore centerline, for a given cartridge and chamber reamer, and chambering method, then there could be discussion about the contributors and results in this.
And with this, the pros and cons to it(a contest in a sense).
I am interested enough to do such a test, but I haven't the time & resources now.
Maybe someday...