Question CSGO 24.5 vs 27 inch question

[bunkin]

Regarding cs go I'm hoping someone has an answer.
On my 27 inch the player models look bigger and easier to hit. On 24.5 inch monitor they look smaller. Same resolution used 1280x960.
Is this placebo and the solution is to move my 24.5 inch way closer to my face than the 27 inch?

 

[biostud]

Since the resolution is the same and your monitor is larger, the models are actually larger.

 

[bononos]

Is there a downside to downgrading the resolution for better fps performance? Will it hurt the response time or make things more blurry? I just tested it with ufo/blurbusters but didn't see any difference.