What is better for gaming a 1440p / 144 hz screen Vs 1080p / 240hz screen?

I personally like 144Hz because it looks a bit more smoother than 60Hz. Although, I won't lie, sometimes I can't feel the difference.

Putting aside my preferences, the technical answer/response is which type of games are you playing? If you're playing first person shooter games, then you do want 240Hz. If you're playing role playing games, then you're fine with 144Hz.

As you usually play D2.
Get a 1440p 144hz, that is more than enough.

1440/144 is a good format with current gen hardware especially if you are utilizing vrr

Most esport style games will get above 144 fps in 1080p but it can be negligible as to how it feels in real world performance

I favour the cleaner clearer resolution as you can still achieve good performance, and have a better view of the game you’re playing

I was using a 1060 on my wife’s set up while looking for an upgrade and I was quite surprised at how well the 1060 handled 1440p, gsync helped a lot but games were very playable and many even felt good/smooth, obviously using low settings, but low settings 1440p still looks better than high settings on 1080p

I play overwatch fortnite diablo 2 destiny 2 call of duty so sacrifce little bit of performance and go with 1440/144 or should will a 240hz/1080 graphics will be ruined that bad? Cause for example if i wanted to play final fantasy 10 or 8 remastered will it look really worse in 1080 than 1440P? cause i rather lose some fps or game power in shooting for good looks or i wont notice the difference?

What are your PC specs?

i'd go 1440 144hz
1080 is more cpu dependent and you are limiting yourself later on graphics
if you get 240 1080p and you update gpu next couple yrs you most likely will need to update monitor again just to justify new gpu

Based on the games you listed, let's categorize them into the two monitors you provided.

144Hz - Diablo 2, FF10, FF8
240Hz - Overwatch, CoD, Destiny 2

You can also run Diablo 2, FF10, and FF8 on 240Hz. But you probably will not notice the difference in the frame rates, 144 frames vs 240 frames, nor will it give you a split second edge in response. Role playing games don't really benefit from a split second response.

However, first person shooter games do benefit from this split second response, which means the 240Hz fresh rate.

Now the part where you lost me, is this "performance". I'm assuming GPU performance when you say "performance". When you're making the relationship between GPU performance and resolution, we need to know the GPU model and not the monitor.

do you like 24" screen or 27"?

lets be honest, nobody here good enough at fps game to even notice difference between 240hz and144hz

Go 1440, 1080p is dead