All of them are legends and my favourite. There is no point camparing them since learning from any of them will give you a good result. But on the basis of my experience I will explain some points for each of them that will help you to analyse who is best for you.

Amit Gupta sir:

# His session usually begin with strategy and the class I have attended from Jim have made me understand so many things. Focus on the intricate conceptual details. Which make you fundamentally strong.

Nks and Nitin Jain sir:

# both are best faculties for physics . They teach in exceptional way they don't provide much notes. And offcourse they give a lot of numerical problem because obviously jee is about numerical problem. They make concept clarify through numerical.

But I want to suggest you one more teacher for physics you can definitely check his video on YouTube his name is nitin vijay sir ( b.tech bhu)

Hope this helps

Have a nice day.