Richard Holdener is a beast and I love him, the way you love a man that tests things, the way this man tests things. The first test is single vs twins, Andrew from Motive Video is going to love this. The next test is remote mounting turbochargers. The findings are both interesting. Maybe not what you expect, maybe what you expect.
In this test on an LS V8 engine, his go to engine currently, he tests a 7875 turbo vs a pair of 3582 turbos. He ran them at four different boost levels. A dyno is best case scenario for boost response, as the dyno loads the engine, sort of like torque braking a car. Even though, there is a difference here. All three of these turbos are cheap turbos, but honestly you won't see much of a spread difference with expensive ones.