I'm not exactly sure what you're asking. Personally -the reverse flow seems more turbulent in A/B configuration (doubt it pulls much water up).
I've just setup the 250 (and added my old 15o) to new controller, set OGC 60%.
they are mounted opposite ends horizontal in my 120DD (4 foot tank), about 3" below surface - standard A/B configuration.
I see some stuff moving up top, but haven't seen a real gyre, or ability to stir more stuff off bottom than the 2 Jaebos and 150 on their own.