Doubt regarding which one is grammatical correct?

hi,
i have a small doubt regarding a sentence. please consider these two sentences...

Bismark is the Iron man of Germany.
Sardar Vallabhai Patel is considered as the Iron man of India.

Now i would like to know which of the following sentences is grammatically correct?

Sardar Vallabhai Patel is to India as Bismark is to Germany.
Sardar Vallabhai Patel is to India as Bismark is for Germany.

I hope i haven't confused you guys. Anyway, from the above sentences i think you must have understood what i am trying to convey.

Thank you very mych.
my sincere regards!