"pa gen mwayen" and "nanpwen mwayen" se menm bagay?

Wi Wi.   Se menm.

Pa gen mwayen.
Nanpwen mwayen.
There are no means.

Pa gen mwayen pou m fè sa.
There are no means by which I can do this.

Mwen pa gen mwayen.
I don't have the means.

Mwen pa gen mwayen pou m nouri tèt mwen.
I don't have the means to feed myself.

Also,
Pa gen fason ... → There's no way ...
Pa gen opòtinite ... → there's no opportunity

Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words