Annular vs downleg boosters on carb

Considering a new carb. AED
The place i am looking at doing one can give me the “ look” i want( black carb, red boosters and metering blocks.
I figured on a 950.
They recommend an 850 with annular boosters. I know an 850 is generally “ bigger” than a 950. He said the 850 if he uses annular boosters will give me the signal i want.
I believe its the older classic hp's are the carbs where 950 has a 750s smaller bore with 1.75 throttle plate. The velocity on those carbs is very good. Newer 950s flow honest 950 or more. It's been a while since I looked at them but I think a newer 950 with annular boosters is a great carb but will hurt flow at top end