ATM/Holley verses Carter 625 AFB

If you want the science behind it you’ll have to call Mark Whitener at Lightning Racing Carbs and ask him.
I was there (MotorsportVillage) when Bruce was explaining it way back when.

So with 20-22 holes, no flow loss and a huge signal gain these boosters make it so you can use a bigger carb not lose any flow. Of course, with booster gain like that atomization goes through the roof.
You're starting to sound like Troy Patterson now. So its still a Holley with an annular discharge booster and its got more holes? Got it.