Gaming notebook? What is the difference between 60, 75, 120 and 144 Hz here? What are their advantages and disadvantages and are you better than the PS4?
Why do you want a gaming laptop?
They are terribly overpriced.
About the Hertz numbers: Just google "refresh rate"
"Gaming" notebook is more marketing than reality.
The Hertz number indicates how often the screen rebuilds its image within one second. Or simply put, how many FPS it can technically display.
144Hz looks worlds smoother than 60Hz.
In order to be able to use this, of course, you have to reach this FPS number first. If you hang around 70-100 FPS the whole time, you just have to consider whether it's worth it.