In WIndows, pressing a key for a function only does that function, or nothing.
I am taking about, for example, in top where
do two totally different things.
Right, an in WIndows it always does two different things. If you keep using it in places where both do nothing, you can make ANYTHING into "not sensitive". But that logic, nearly every letter on the keyboard does the same thing - nothing. So you just told me that WIndows isn't "key sensitive". See why that makes no sense?