The way I understand it is:
The ATR one goes air going in bit - 4 big channels (or runners? dunno) then basically engine
The Prelude one goes air going in bit - IAB thing - 8 smaller channels (but it only looks like 4 from the outside because each one is dual?) then basically engine
Very simplified and not using any proper names because I don't know what the drokk I'm talking about really. I may be very wrong
But if you're going to use a free-er flowing manifold with what seems to me like a more direct air route with less control (in a way?) then you're going to need a remap so compensation can be made otherwise it will run lean?