I'm not senior but let me try
Since all the banks have piled up a lot of cash,
the RBI says, that they can accommodate Inr. 300 Billion by way of bidding at equal or higher repo rate.
Repo Rate is the interest earned by Banks on the money lent/given/Deposited to RBI.
Therefore, each Bank can participate in the auction to effectively earn a bit more interest.
On the other hand,
CRR, ie, Cash Reserve Ratio was also increased temporarily, that means, Banks had to lock more money with RBI Interest free.
This is incremental 100% of their current deposit.
More or less, both moves appear to nullify the effects and therefore, IMHO, I don't think its a big difference.