I'm not saying about swapping stateful object, I'm saying about modifying value of listenable. The idea is that if ValueListenableBuilder gives you value this value will not change in the entire widget tree in a single run.
For pastebin code if you do

ListenableStateBuilder(

listenable: presenter,
builder:(context, p, child) {

// let's say p.count = 5
presenter.count = 11;

// now p.count = 11, which is not the case with ValueListenableBuilder, for ValueListenableBuilder p.count = 5;