Difference between "Gift to Relative" and "Transfer between Specified Family Members" Shares in Dema

Dear Sir,

I plan to transfer certain shares from my Demat account to my brother's daughter's demat account ONLINE.

For transfer shares in off-market mode, I have to disclose reasons for transfer, under which I found two options: "Gift" and "Transfer between specified Family members".

Request experts to please enlighten me the difference between "Gift" and transfer between specified family members" please?

What are the income tax implications on "Gifting to Relative" and "Transferring to Specified Family Member"?

Regards,