Holley/Demon Carb stumble

OK HERE WE GO!!!!!!
Mitty Demon 850 ET slips,
850 Proform carb ET slips,
Same day, Same air, Same launch.............How will they stack up.................
Final comparison

Only thing different is that the Demon got 6.5 PV, Removed for a 10.5 PV..........will it make any difference in the stumble???........ Probably not.
Hope to get lots of answer tomorrow..........Or at least good data
First 2 run will be a long High gear pull. hoping i can get the gopro to capture some O2 reading pulling thru top gear, with both carbs.

Will be starting out the day with a vacuum gauge tape to my windshield
Several runs with the Demon, then run the Proform the rest of the day.