750 Brawler vs 650 AVS 2 at the track, right OOTB !

Are you surprised? Irrespective that's a large difference in available airflow.

Best MPH isn't it always quoted as the power the engine is making so.....

Did you factor in booster restriction in your calcs? If you have ever pulled down a Carter/Eddie carb and looked at the booster and compared it to a Holley downleg you would understand what I'm talking about. Add to that the fact that the primary booster in the AVS is annular in design then its even more restrictive again.
It didn't matter to me which carb did what. To me, it was a fun little test and a great day at the track. Yes, MPH is a HP indicator but with the wind I thought the cars MPH might move a little. Still, the AVS did go over 105 two of the three runs, and the Brawler on it's two passes was just under 105. Also, I did not play any shift point games, because I didn't have time (passes). All passes were at 5,000 rpms, all launches were the same AFTER the first initial launch to test how the car would bite after losing 80 lbs over the axle.