But the details I use to guess this or look at a web site for numbers are missing.

So let's equip YOU to do the research. Put notebookcheck into google and find those laptops. If not the exact laptop then look at the GPU at notebookcheck to figure out which GPU will do better gaming.

-> Remember that gaming laptops are still shorter lived things than non-gaming laptops. If you are fine with a dead laptop in 2 years they you are ready for gaming laptops.