NIW vs LC for GC for a foreign doctor on H-1 previously J-1

[docKLM2002]

Hi
I am a foreign medical doctor and recently obtained my H1B visa.(I was on J-1)
I have to do my J-1 waiver job in a medically underserved area.
The job is lined up and ready, everything is fine.
Now, I have to decide which way to go for the green card, either NIW or LC.
I have read about both but still do not know which one would be most beneficial at this time.
Can anyone help me ?
I would be very grateful