annular vs downleg

Well, I read in 2 different forums lately stating that if you're running a Super Victor, always run a carb with annular boosters.

No explanation why and it's got me wondering. I run said super Victor and a HP950 (down leg boosters).

Is this the usual Internet malarky or is there something to it?

Never gave the 2 booster designs a thought. Til now...

Velocity can be slowed due to a larger manifold runner if the cylinder volume
isn't proportionally increased by means of bore and or stroke.
As an attempt to make up for this slower column or weaker signal at the base of the carb the booster can be swapped for a more sensitive design. This design is the annular booster.
The carb can remain responsive with less velocity being pulled thru the venturi.
Increasing the volumetric efficiency if the correct balance of fuel and air is met.
I have never used annular boosters myself as I haven't strayed away from stock
stroke or excessively oversized ports.
Perhaps you can get some here who have needed them to chime in with a better
description or experience.
I have always wanted to try them on a tunnel ram but never actually felt it was necessary.
All my engines seemed to do good without them.

Annular for the street. downleg for wide open throttle race car

Annular...

Quickfuel makes a really nice 950 race carb with annular boosters. Pretty sure the venturi size is bigger than the HP 950 AND it I believe it really flows 950 cfm, unlike the Holley.

Guess I got an itch

In general, annular usually provides a slightly higher boost signal and also smaller droplets. Downlegs also have a slightly higher booster signal, but take more velocity to get started.
Annulars come in different sizes with different numbers of holes so those two factors alter the results as well.

Although we all like to think that smaller droplet is always good, in some situations its not. Depends on how hot the intake gets, how good the fuel distribution is, how well the fuel gasifies in the combustion chamber and this can vary with rpm and load.

It's possible a specific booster works better with a specific intake, but its hard to rule out other possible reasons unless its same carb where someone then changed the boosters.