Dear Arjun,
R1 and R2 are classified as very high research activity and high research activity.
If you are interested research then surely going into R1 University will be beneficial for you, but R1 Universities will be very demanding on youy educational background.
So I request you to check and understand their criterias before applying.

I hope this information helps you

All the best

Hello dear student !!

As R1 doctoral universities are considered for highest research activity so R1 is better than R2. But R1 universities are very demanding on the basis of performances soI would suggest you to once go through the  all the details before getting into it.

All the best