Which do you prefer on a stock 170? Carter or Holley 1920?

Which one would flow more air? I see that the Carter is more readily available from parts warehouses than the Holley 1920. I've got one that was on the engine when I got it that crossed to a year of 1962. It didn't have the vacuum spring staged choke pulloff on it like the rebuilt one I got from Advance. I had the restrictive original 170 air cleaner on mine which I changed over to one from a 66 225 which seems to have a bigger opening because it doesn't sit centered on the carb throat. I was told when I bought that air cleaner it was from a 66 Valiant with a 225 California. But it looks like it would flow more air because it's open on the bottom.