I also use roughly a 9 inch sens in tf2 and a 15 inch sens in cs
nearly every top tier csgo player falls in a fairly predictable sens of ranges, roughly between 10 and 40 inches per 360, with the median seeming to be in like the 17 to 22 inch range
I strongly recommend trying that; reaaaally good natural aimers like f0rest and hiko sometimes push things by going up to like a 10 inch 360 but there are maybe 5 or 6 solid or better players in the entire csgo scene who use higher than that
and fyi switching between the two games with two different sensitivities is insanely easy because the games as a whole are so much different anyways