The Core i9-14900K and Core i9-13900KS are essentially the same CPU, featuring practically identical stock frequencies, but for overclocking it wasn’t clear which one would be better. For such highly clocked CPUs, binning is the deciding factor, and although the 14900K is newer, it doesn’t have that special -KS suffix that denotes a Special

Source: Hot Hardware – Huge CPU Binning Test Compares Intel’s Core i9-14900K Raptor Lake Refresh To 13900KS