The Intel Core i9-9900KS is slightly more powerful than other processors.
Core i9-9900KF and Intel Core i9-9900K are exactly the same in terms of features.
The difference is that the Intel Core i9-9900KF does not have onboard graphics.
So, if we are going to make a purchase order, my suggestion is;
1- Intel Core i9-9900KS
2- Intel Core i9-9900K
3- Intel Core i9-9900KF
Core i9-9900KF and Intel Core i9-9900K are exactly the same in terms of features.
The difference is that the Intel Core i9-9900KF does not have onboard graphics.
So, if we are going to make a purchase order, my suggestion is;
1- Intel Core i9-9900KS
2- Intel Core i9-9900K
3- Intel Core i9-9900KF