Gta 5 essentially the same game if you dont take into account all the new vehicles they add
The only major change was heists but thats it
Csgo is not even the same game it was 10 years ago and the fact that its 1 year older doesent do any favors to gta
Even if we forget about the age, the main point of gta is still singleplayer compaign. And its been almost a decade with no change at all.
But overall both games are very difficult and hard to compare but i havent played gta in a year and i played csgo surf yesterday evening so that might tell you something about my views