Holley question, what do think of Vacuum Secondary vs "Double Pumper"?

With a very mild 10:1 340, 727 automatic, 2,500 converter, 3.55 gears: What Holley carburetor do you think would be better, a 750 vacuum secondary (#3310 or equal), or a 750 Double Pumper type Holley? I may consider Holley clones too, like the old Demon, or something else of that basic 4150 Holley design. Thanks!