A box stock Dominator bowl w/o stuffer plate replaced one of our best detailed Berkeley G bowls w/stuffer plate on 418, Chris's Daytona. This boat was very consistent, running 8.0 its first pass off the trailer at Firebird.
Chris concluded that the two were very close. He did say, "It (stock Dominator bowl) didn't tug down the engine quite as hard" as the fully detailed Berkeley. I attribute this to turbulent flow not building pressure quite as fast, however the number was there.
Another case, a fully-detailed Dominator replaced a fully-detailed Berkeley on a deadly consistent 9.0 second gullwing. The boat ran consistently .15 seconds quicker with the fully-detailed Dominator bowl, requiring reprogramming of the electronics to again run the number.
Granted, these are not back-to-back repeatable tests, it is a fair analysis.