Business account yes or no?

and what are the benefits?

I presume yes.

Do you have just your top one business accounts and repinning accounts personal or all business?

Main difference with a regular account is having access to all the data regarding your account performance, which is helpful to see what works best for you.

Regarding the choice works well both ways, there's always a none written rule in social media that says having a business account may put you in the radar or those who want to make money so perhaps keep a regular account for spam proposes.

There is no much difference, you just get to see more of your account stats.

Always a yes, because you have access to different ad tools, insights, proffesional dashboard to get more details about your interaction with viewers and customers and at the end that will help you understand if you are doing it right, so yes.

If its a Brand account, always YES you will be able to unlock lot of things which can help you understand what is working well.
And how you can improve to drive more traffic to website.

Yes you do need a business account…Yes, you do. It should be a current Account, for various reasons. First, in Current account , you can issue more number of cheques and the volume of your transactions are not restricted. Next, if and when your income tax Return comes under scrutiny and you are found managing your finances through your savings account, it will be very difficult to explain the Tax officials, the entries not pertaining to business. And if such entries are credit entries, they may add it as your income. Debit entries of personal nature may be disallowed as Expenses. In either case you end up paying more tax.