As you know this covid situation is getting better day by day. So you're asking for which is best kotab or ranchi. It's depends only upon you because Allen provides same content every where in all over the India. As you know kota is full of students so if you go there you will see the real compitition Because you will find there how the students devoted about theirs exams and there you got different confidence. So go for Kota not for Ranchi but it's only depends on you. Where you want to go.

I hope you got all my points. Best of luck for future.