When I was in the building my 434 Brett Miller told me to go Dominator on a Dominator flanged intake. He also told me to not use an adapter on a 4150 intake, just stay with a 4150.
I’ve heard the same thing repeated by many different people. But a Dominator on a dual plane was never even part of the conversation. I would guess 99.999% of the time when someone is comparing a 4500 to a 4150 all the intakes were single plane.