By uncertainty principle, we know that determining particle's position at some location is limited. So we cannot determine the position of a particle at some exact point location as this would make the standard deviation of momentum reach infinite.

But as far as I know, spin is exactly determined when a particle gets measured - although before measurement it can exist in superposition of different states.

So, why are these two quantities(?) different? (Also, as far as I know, spin is part of wavefunction that includes position, right?)