I think I get what you mean. The standard ABS master cylinder has 2 outlets which normally go to a pump each. Remove the pump and repipe each of the outlets to the 3 way connector.

So in theory the 3 way connector still feeds (left or right) the front and rear brake on each side.

Where as a non abs car the master cylinder has 4 outlets, 1 for each brake.

Is there a advantage of piping each wheel seperatly using a non abs master cylinder or each side from the 2 way connector using the standard master cylinder and a non abs resevoir.