Flash holes...
Farmer Boy 78--Flash holes are put into cases one of 2 ways by the factory making the cases: They are punched, in cheaper cases, which leaves a "hanging chadd" inside the case, which could interfere with, or affect the relationship between, the primer flash and the powder being ingnited. Or, in more expensive cases, the flash holes are drilled, which leaves a nice clean round hole with no hanging residue. Lapua, Norma, and Nosler drill their holes. I expect that Hornady Competition does, too. Win, Fed, and Rem cases have punched holes.
In prepping cases for high-grade ammo, the drilled-hole cases need no extra treatment of the flash holes. The punched-hole cases have to be reamed out with a tool called a flash hole reamer, that cleans up the flash hole from the inside of the case. Not having to do that step of case prep is one of the several things you get when you pay for the higher-grade brass.
BTW, I don't regard it as a dumb question--You don't know, you need to ask. The dumb thing would have been pretending that you knew, and just remaining confused.
And, if you still think it was a dumb question, well, dumb questions are easier and cheaper to handle than dumb mistakes.
As to case prep versus performance, after you've reamed the flash holes, trimmed to uniform length, chamfered inside and outside the neck, and separated them into lots by weight (lighter case=greater volume; heavier case=less volume) and tested 3 lots, light, medium, and heavy, one of the 3 lots of Win brass will perform for you just like Norma or Lapua brass would, straight out of the box. Me, I just buy the high-grade brass to begin with. Life's too short to spend a great deal of time prepping brass, and the good stuff isn't THAT much more expensive.
Can't comment on Atblis' remark above. The Win brass I have is not of recent manufacture, and its performance in my "ordinary" rifles (as opposed to my "serious" rifles) has been quite satisfactory. Same is true of the Fed and the Rem brass I've been using, as far as that goes. My "serious" rifles each have their own lot of high-grade brass.