Assuming the screens are otherwise identical, the 24 might appear crisper as the same amount of pixels are squashed into a smaller space. The 27inch though, is noticabley bigger.

I'm thinking of a 27" next, the 24" will surely have a slightly crisper image but the size of the 27" which will be noticably bigger will surely be more immersive
Heres a weird though, if the screen is bigger, does it take longer to aim!?
