As a first; I'm not a professional pyrotechnican, i'm only saying what i can say out of experiences and my thoughts.
I think it's impossible to reckon 200 cheaper shells above 10 super-quality shells as a professional pyrotechnican. If you do, you'll get a highly sky-filled show, with grey, weak colors. No way you'll get in the news with thát! And even if you'll get in the news, the header would be "Nice skyline lasts show BUT [insert critiques]". And that's not your goal, as a pyrotechnican, appears me. You don't always want to have a "but" in the headers when it's about your show last night. If you choose for those 10 super quality shells, the sky will be highly less filled, but the colors and shapes of the peony's for example will be so fantastic, you'll make the crowd and the press forget the less filled sky.
Apparently, the shooters nowadays generally think "the general public does not know the difference", and even if they're right with that, in my opinion is Fireworks a hobby and a passion for every shooter, and why would you then take the less quality products?
Kind Greetings!
-Sander