So you compare a huge and heavy laptop with two thin and light ones... Why? Why not compare it with a similarly heavy and big laptop that comes with GTX2080?
Ah, because it wouldn't get the slightly better framerates and it won't fare that good, right? And you have an agenda.
You see what people understand form this review? They get that a very heavy, big and expensive Dell machine is only marginally more powerful than two slim and elegant laptops that are way cheaper.