Divorce

The opinion and advise of your lawyer is based on facts and correct, follow it to file a petition for RCR, which shall be a ground for divorce being "desertion". 

Appreciate your advocate's good advice.  These differences of opinion are common between educated couples during the initial days of marriage as it is very hard to adjust and compromise with unknown persons till marriage.   Have patience and mature persons can understand each other after some time.  Forget about the differences, ignore silly things, have peace of mind, and in due course of time, everything settles itself..  The only regret is much of youth is being wasted without peace of mind.

The facts posted do not suggest any grounds for seeking divorce on mutual grounds. RCR is a legal option but institution the proceedings may boomerang leading to counter cases under DV Act, 498A etc. 

Getting a divorce case disposed is not a quick process, especially a contested divorce.

Similarly the the disposal of RCR case also may take years.

In fact it is not advisable to file the RCR and go through the process for years before the case is disposed and the disadvantage in the RCR case is  that even if you get  decision in your favor, you cannot force her to rejoin you and liver together with you 

If she is not showing any interest to return to the matrimonial fold to offer you the conjugal rights/relationship for more than a year after you getting a decree in your favor, you can file a divorce case on the same grounds. 

That again will take another three to four years or beyond that.

Therefore it would be an option before you to withdraw the RCR case and file a contested divorce case on the grounds of cruelty or you can wait for another year and add the desertion also as another ground for seeking divorce.