To answer your question B, both of the centers of Eugenix maintain the same standard of work. Gurgaon is their head of operation center. Most of their international patients had their procedure in Gurgaon, same applies for me also. Around 40 minutes drive from the airport. But no Matter which location you select, quality of work will be same.
In my opinion, you should also address the frontal part. A new hairline will shape your face. Moreover, you should select a clinic where they take your pre existing hair in consideration and implant in between.