lets start with the basic
Ravish is an accomplished army officer, serving the nation and in a sense a bit of a national hero. He is well educated and well groomed and has a good upbringing with a proper army family.
Atharv is also educated and was trying to set up a business and was everything in his life was all about him and his mother and his love for vividha and how he had to get her at all costs. So he in sense a little self absorbed and selfish. He was raised in a small city without much resources and does not have the proper grooming.
Ravish is tall fair and goodlooking. Atharv is kind of short, dark and to some, and people who fall for drivers and cooks probably find him handsome also. Also both Ramkant and Sujata were fair, then how come Atharv is dark.
Ravish has a purpose in life. Is in the army, beleives in family respect and family bond. respects women, has not tried to consummate with Vividha.
Atharv also had a prupose in life, but for him everything was about him. He was always fighting with Sujata and even refused to meet Ramakant. he was always a bit horny also.
Ravish in true essence a good life partner for vividha. Atharv did not really have a plan for survival after marriage, was making vividha go against everything that she beleived in.
These are just some points, in which one comes as a bit of a goody two shoes whereas the other comes across as bit of a good for nothing majnu sort.
would appreciate if you guys can add to the list for a good charcater skectch of both👏